28756296 has 80 divisors (see below), whose sum is σ = 81312000. Its totient is φ = 9494496.

The previous prime is 28756267. The next prime is 28756303. The reversal of 28756296 is 69265782.

28756296 is a `hidden beast` number, since 2 + 87 + 562 + 9 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 128841 + ... + 129063.

It is an arithmetic number, because the mean of its divisors is an integer number (1016400).

Almost surely, 2^28756296 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28756296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40656000).

28756296 is an abundant number, since it is smaller than the sum of its proper divisors (52555704).

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

28756296 is a wasteful number, since it uses less digits than its factorization.

28756296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 427 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 28756296 is about 5362.4897202699. The cubic root of 28756296 is about 306.3686445200.

The spelling of 28756296 in words is "twenty-eight million, seven hundred fifty-six thousand, two hundred ninety-six".