72288392 has 16 divisors (see below), whose sum is σ = 147862800. Its totient is φ = 32858320.

The previous prime is 72288383. The next prime is 72288421. The reversal of 72288392 is 29388227.

It is a super-2 number, since 2×72288392² = 10451223235891328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410642 + ... + 410817.

It is an arithmetic number, because the mean of its divisors is an integer number (9241425).

Almost surely, 2^72288392 is an apocalyptic number.

It is an amenable number.

72288392 is an abundant number, since it is smaller than the sum of its proper divisors (75574408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72288392 is a wasteful number, since it uses less digits than its factorization.

72288392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821476 (or 821472 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 72288392 is about 8502.2580530116. The cubic root of 72288392 is about 416.5714686691.

The spelling of 72288392 in words is "seventy-two million, two hundred eighty-eight thousand, three hundred ninety-two".