72928829 has 4 divisors (see below), whose sum is σ = 72985440. Its totient is φ = 72872220.

The previous prime is 72928789. The next prime is 72928847. The reversal of 72928829 is 92882927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92882927 = 157 ⋅591611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72928829 is a prime.

It is a super-2 number, since 2×72928829² = 10637228198622482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72928529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26327 + ... + 28964.

It is an arithmetic number, because the mean of its divisors is an integer number (18246360).

Almost surely, 2^72928829 is an apocalyptic number.

It is an amenable number.

72928829 is a deficient number, since it is larger than the sum of its proper divisors (56611).

72928829 is a wasteful number, since it uses less digits than its factorization.

72928829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56610.

The product of its digits is 290304, while the sum is 47.

The square root of 72928829 is about 8539.8377619250. The cubic root of 72928829 is about 417.7980545845.

The spelling of 72928829 in words is "seventy-two million, nine hundred twenty-eight thousand, eight hundred twenty-nine".