28970156 has 18 divisors (see below), whose sum is σ = 53001732. Its totient is φ = 13854280.

The previous prime is 28970147. The next prime is 28970167. The reversal of 28970156 is 65107982.

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, 4730 + ... + 8961.

Almost surely, 2^28970156 is an apocalyptic number.

It is an amenable number.

28970156 is a deficient number, since it is larger than the sum of its proper divisors (24031576).

28970156 is a wasteful number, since it uses less digits than its factorization.

28970156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13741 (or 13716 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 28970156 is about 5382.3931480337. The cubic root of 28970156 is about 307.1262553338.

The spelling of 28970156 in words is "twenty-eight million, nine hundred seventy thousand, one hundred fifty-six".