28481968 has 30 divisors (see below), whose sum is σ = 56353164. Its totient is φ = 13942368.

The previous prime is 28481951. The next prime is 28481977. The reversal of 28481968 is 86918482.

It is a super-2 number, since 2×28481968² = 1622445002306048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 174655 + ... + 174817.

Almost surely, 2^28481968 is an apocalyptic number.

It is an amenable number.

28481968 is a deficient number, since it is larger than the sum of its proper divisors (27871196).

28481968 is an equidigital number, since it uses as much as digits as its factorization.

28481968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 232 counting only the distinct ones).

The product of its digits is 221184, while the sum is 46.

The square root of 28481968 is about 5336.8500072608. The cubic root of 28481968 is about 305.3913028297.

The spelling of 28481968 in words is "twenty-eight million, four hundred eighty-one thousand, nine hundred sixty-eight".