28504932 has 12 divisors (see below), whose sum is σ = 66511536. Its totient is φ = 9501640.

The previous prime is 28504913. The next prime is 28504933. The reversal of 28504932 is 23940582.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28504932² = 1625062296649248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28504893 and 28504902.

It is not an unprimeable number, because it can be changed into a prime (28504933) 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, 1187694 + ... + 1187717.

It is an arithmetic number, because the mean of its divisors is an integer number (5542628).

Almost surely, 2^28504932 is an apocalyptic number.

It is an amenable number.

28504932 is an abundant number, since it is smaller than the sum of its proper divisors (38006604).

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

28504932 is a wasteful number, since it uses less digits than its factorization.

28504932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375418 (or 2375416 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 28504932 is about 5339.0010301554. The cubic root of 28504932 is about 305.4733561712.

The spelling of 28504932 in words is "twenty-eight million, five hundred four thousand, nine hundred thirty-two".