28976520 has 128 divisors (see below), whose sum is σ = 93312000. Its totient is φ = 7176960.

The previous prime is 28976503. The next prime is 28976567. The reversal of 28976520 is 2567982.

It is a happy number.

It is a super-2 number, since 2×28976520² = 1679277422620800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161791 + ... + 161969.

It is an arithmetic number, because the mean of its divisors is an integer number (729000).

Almost surely, 2^28976520 is an apocalyptic number.

28976520 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 28976520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46656000).

28976520 is an abundant number, since it is smaller than the sum of its proper divisors (64335480).

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

28976520 is a wasteful number, since it uses less digits than its factorization.

28976520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 28976520 is about 5382.9843024107. The cubic root of 28976520 is about 307.1487429401.

The spelling of 28976520 in words is "twenty-eight million, nine hundred seventy-six thousand, five hundred twenty".