28232504 has 8 divisors (see below), whose sum is σ = 52935960. Its totient is φ = 14116248.

The previous prime is 28232497. The next prime is 28232513. The reversal of 28232504 is 40523282.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28232504² = 1594148564220032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1764524 + ... + 1764539.

It is an arithmetic number, because the mean of its divisors is an integer number (6616995).

Almost surely, 2^28232504 is an apocalyptic number.

It is an amenable number.

28232504 is a deficient number, since it is larger than the sum of its proper divisors (24703456).

28232504 is a wasteful number, since it uses less digits than its factorization.

28232504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3529069 (or 3529065 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 28232504 is about 5313.4267662216. The cubic root of 28232504 is about 304.4970803473.

Adding to 28232504 its reverse (40523282), we get a palindrome (68755786).

The spelling of 28232504 in words is "twenty-eight million, two hundred thirty-two thousand, five hundred four".