72869828 has 6 divisors (see below), whose sum is σ = 127522206. Its totient is φ = 36434912.

The previous prime is 72869789. The next prime is 72869851. The reversal of 72869828 is 82896827.

It can be written as a sum of positive squares in only one way, i.e., 37847104 + 35022724 = 6152^2 + 5918^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9108725 + ... + 9108732.

It is an arithmetic number, because the mean of its divisors is an integer number (21253701).

Almost surely, 2^72869828 is an apocalyptic number.

It is an amenable number.

72869828 is a deficient number, since it is larger than the sum of its proper divisors (54652378).

72869828 is a wasteful number, since it uses less digits than its factorization.

72869828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18217461 (or 18217459 counting only the distinct ones).

The product of its digits is 774144, while the sum is 50.

The square root of 72869828 is about 8536.3826062332. The cubic root of 72869828 is about 417.6853549661.

The spelling of 72869828 in words is "seventy-two million, eight hundred sixty-nine thousand, eight hundred twenty-eight".