28472924 has 6 divisors (see below), whose sum is σ = 49827624. Its totient is φ = 14236460.

The previous prime is 28472893. The next prime is 28472947. The reversal of 28472924 is 42927482.

It is a super-2 number, since 2×28472924² = 1621414802219552, 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, 3559112 + ... + 3559119.

It is an arithmetic number, because the mean of its divisors is an integer number (8304604).

Almost surely, 2^28472924 is an apocalyptic number.

It is an amenable number.

28472924 is a deficient number, since it is larger than the sum of its proper divisors (21354700).

28472924 is a wasteful number, since it uses less digits than its factorization.

28472924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7118235 (or 7118233 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 28472924 is about 5336.0026236875. The cubic root of 28472924 is about 305.3589753429.

The spelling of 28472924 in words is "twenty-eight million, four hundred seventy-two thousand, nine hundred twenty-four".