72282388 has 6 divisors (see below), whose sum is σ = 126494186. Its totient is φ = 36141192.

The previous prime is 72282373. The next prime is 72282401. The reversal of 72282388 is 88328227.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 42667024 + 29615364 = 6532^2 + 5442^2 .

It is a super-2 number, since 2×72282388² = 10449487229965088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72282388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9035295 + ... + 9035302.

Almost surely, 2^72282388 is an apocalyptic number.

It is an amenable number.

72282388 is a deficient number, since it is larger than the sum of its proper divisors (54211798).

72282388 is a wasteful number, since it uses less digits than its factorization.

72282388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18070601 (or 18070599 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 72282388 is about 8501.9049630068. The cubic root of 72282388 is about 416.5599354004.

The spelling of 72282388 in words is "seventy-two million, two hundred eighty-two thousand, three hundred eighty-eight".