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28097495 = 527720287
BaseRepresentation
bin110101100101…
…1101111010111
31221212111111222
41223023233113
524143104440
62442120555
7460552616
oct153135727
957774458
1028097495
1114951078
1294b015b
135a8a04a
143a3587d
1527002b5
hex1acbbd7

28097495 has 8 divisors (see below), whose sum is σ = 33840384. Its totient is φ = 22395744.

The previous prime is 28097483. The next prime is 28097497. The reversal of 28097495 is 59479082.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28097495 - 24 = 28097479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28097497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8759 + ... + 11528.

It is an arithmetic number, because the mean of its divisors is an integer number (4230048).

Almost surely, 228097495 is an apocalyptic number.

28097495 is a deficient number, since it is larger than the sum of its proper divisors (5742889).

28097495 is a wasteful number, since it uses less digits than its factorization.

28097495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20569.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 28097495 is about 5300.7070283124. The cubic root of 28097495 is about 304.0109320572.

The spelling of 28097495 in words is "twenty-eight million, ninety-seven thousand, four hundred ninety-five".

Divisors: 1 5 277 1385 20287 101435 5619499 28097495