28252232 has 32 divisors (see below), whose sum is σ = 56359800. Its totient is φ = 13231104.

The previous prime is 28252219. The next prime is 28252243. The reversal of 28252232 is 23225282.

It can be written as a sum of positive squares in 4 ways, for example, as 27394756 + 857476 = 5234^2 + 926^2 .

It is a super-2 number, since 2×28252232² = 1596377225963648, which contains 22 as substring.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 39494 + ... + 40202.

Almost surely, 2^28252232 is an apocalyptic number.

It is an amenable number.

28252232 is a deficient number, since it is larger than the sum of its proper divisors (28107568).

28252232 is a wasteful number, since it uses less digits than its factorization.

28252232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025 (or 1021 counting only the distinct ones).

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

The square root of 28252232 is about 5315.2828711180. The cubic root of 28252232 is about 304.5679882123.

The spelling of 28252232 in words is "twenty-eight million, two hundred fifty-two thousand, two hundred thirty-two".