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28329080 = 23513157347
BaseRepresentation
bin110110000010…
…0010001111000
31222022021012012
41230010101320
524223012310
62451105052
7462536033
oct154042170
958267165
1028329080
1114a9a06a
1295a2188
135b3b590
143a9601a
152748c05
hex1b04478

28329080 has 64 divisors (see below), whose sum is σ = 69279840. Its totient is φ = 10363392.

The previous prime is 28329079. The next prime is 28329127. The reversal of 28329080 is 8092382.

28329080 = T1936 + T1937 + ... + T1950.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81467 + ... + 81813.

Almost surely, 228329080 is an apocalyptic number.

28329080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28329080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34639920).

28329080 is an abundant number, since it is smaller than the sum of its proper divisors (40950760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28329080 is a wasteful number, since it uses less digits than its factorization.

28329080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 28329080 is about 5322.5069281308. The cubic root of 28329080 is about 304.8438867832.

The spelling of 28329080 in words is "twenty-eight million, three hundred twenty-nine thousand, eighty".

Divisors: 1 2 4 5 8 10 13 20 26 40 52 65 104 130 157 260 314 347 520 628 694 785 1256 1388 1570 1735 2041 2776 3140 3470 4082 4511 6280 6940 8164 9022 10205 13880 16328 18044 20410 22555 36088 40820 45110 54479 81640 90220 108958 180440 217916 272395 435832 544790 708227 1089580 1416454 2179160 2832908 3541135 5665816 7082270 14164540 28329080