28402492 has 12 divisors (see below), whose sum is σ = 52320520. Its totient is φ = 13453776.

The previous prime is 28402487. The next prime is 28402501. The reversal of 28402492 is 29420482.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186783 + ... + 186934.

Almost surely, 2^28402492 is an apocalyptic number.

It is an amenable number.

28402492 is a deficient number, since it is larger than the sum of its proper divisors (23918028).

28402492 is a wasteful number, since it uses less digits than its factorization.

28402492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373740 (or 373738 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 28402492 is about 5329.3988403947. The cubic root of 28402492 is about 305.1069838792.

The spelling of 28402492 in words is "twenty-eight million, four hundred two thousand, four hundred ninety-two".