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28540054 = 261323279
BaseRepresentation
bin110110011011…
…1110010010110
31222200222121001
41230313302112
524301240204
62455413514
7464405104
oct154676226
958628531
1028540054
1115123624
12968429a
135bb360a
143b0cc74
15278b4a4
hex1b37c96

28540054 has 8 divisors (see below), whose sum is σ = 42881760. Its totient is φ = 14246136.

The previous prime is 28540051. The next prime is 28540063. The reversal of 28540054 is 45004582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28540051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10414 + ... + 12865.

It is an arithmetic number, because the mean of its divisors is an integer number (5360220).

Almost surely, 228540054 is an apocalyptic number.

28540054 is a deficient number, since it is larger than the sum of its proper divisors (14341706).

28540054 is a wasteful number, since it uses less digits than its factorization.

28540054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23894.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 28540054 is about 5342.2892096928. The cubic root of 28540054 is about 305.5987664191.

The spelling of 28540054 in words is "twenty-eight million, five hundred forty thousand, fifty-four".

Divisors: 1 2 613 1226 23279 46558 14270027 28540054