28970858 has 24 divisors (see below), whose sum is σ = 53215200. Its totient is φ = 11761848.

The previous prime is 28970803. The next prime is 28970881. The reversal of 28970858 is 85807982.

It is a super-2 number, since 2×28970858² = 1678621226512328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5918 + ... + 9641.

It is an arithmetic number, because the mean of its divisors is an integer number (2217300).

Almost surely, 2^28970858 is an apocalyptic number.

28970858 is a deficient number, since it is larger than the sum of its proper divisors (24244342).

28970858 is a wasteful number, since it uses less digits than its factorization.

28970858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15594 (or 15587 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

The square root of 28970858 is about 5382.4583602662. The cubic root of 28970858 is about 307.1287360579.

The spelling of 28970858 in words is "twenty-eight million, nine hundred seventy thousand, eight hundred fifty-eight".