28655212 has 6 divisors (see below), whose sum is σ = 50146628. Its totient is φ = 14327604.

The previous prime is 28655203. The next prime is 28655227. The reversal of 28655212 is 21255682.

It is a super-2 number, since 2×28655212² = 1642242349529888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3581898 + ... + 3581905.

Almost surely, 2^28655212 is an apocalyptic number.

It is an amenable number.

28655212 is a deficient number, since it is larger than the sum of its proper divisors (21491416).

28655212 is a wasteful number, since it uses less digits than its factorization.

28655212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7163807 (or 7163805 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 28655212 is about 5353.0563232606. The cubic root of 28655212 is about 306.0092411808.

The spelling of 28655212 in words is "twenty-eight million, six hundred fifty-five thousand, two hundred twelve".