28672929 has 6 divisors (see below), whose sum is σ = 41416466. Its totient is φ = 19115280.

The previous prime is 28672921. The next prime is 28672933. The reversal of 28672929 is 92927682.

It can be written as a sum of positive squares in only one way, i.e., 24059025 + 4613904 = 4905^2 + 2148^2 .

It is not a de Polignac number, because 28672929 - 2³ = 28672921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28672921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1592932 + ... + 1592949.

Almost surely, 2^28672929 is an apocalyptic number.

It is an amenable number.

28672929 is a deficient number, since it is larger than the sum of its proper divisors (12743537).

28672929 is a wasteful number, since it uses less digits than its factorization.

28672929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3185887 (or 3185884 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 28672929 is about 5354.7109165668. The cubic root of 28672929 is about 306.0722948497.

The spelling of 28672929 in words is "twenty-eight million, six hundred seventy-two thousand, nine hundred twenty-nine".