28612971 has 12 divisors (see below), whose sum is σ = 41563080. Its totient is φ = 18967680.

The previous prime is 28612967. The next prime is 28612979. The reversal of 28612971 is 17921682.

It is not a de Polignac number, because 28612971 - 2² = 28612967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28612979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7270 + ... + 10491.

It is an arithmetic number, because the mean of its divisors is an integer number (3463590).

Almost surely, 2^28612971 is an apocalyptic number.

28612971 is a deficient number, since it is larger than the sum of its proper divisors (12950109).

28612971 is a wasteful number, since it uses less digits than its factorization.

28612971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17946 (or 17943 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 28612971 is about 5349.1093651186. The cubic root of 28612971 is about 305.8588032419.

It can be divided in two parts, 2861 and 2971, that added together give a cube (5832 = 18³).

The spelling of 28612971 in words is "twenty-eight million, six hundred twelve thousand, nine hundred seventy-one".