28004932 has 6 divisors (see below), whose sum is σ = 49008638. Its totient is φ = 14002464.

The previous prime is 28004909. The next prime is 28004939. The reversal of 28004932 is 23940082.

It can be written as a sum of positive squares in only one way, i.e., 27520516 + 484416 = 5246^2 + 696^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28004932.

It is not an unprimeable number, because it can be changed into a prime (28004939) by changing a digit.

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 as a sum of consecutive naturals, namely, 3500613 + ... + 3500620.

Almost surely, 2^28004932 is an apocalyptic number.

It is an amenable number.

28004932 is a deficient number, since it is larger than the sum of its proper divisors (21003706).

28004932 is a wasteful number, since it uses less digits than its factorization.

28004932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001237 (or 7001235 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 28004932 is about 5291.9686318042. The cubic root of 28004932 is about 303.6767252561.

The spelling of 28004932 in words is "twenty-eight million, four thousand, nine hundred thirty-two".