72387365 has 8 divisors (see below), whose sum is σ = 86968728. Its totient is φ = 57840640.

The previous prime is 72387313. The next prime is 72387373. The reversal of 72387365 is 56378327.

It can be written as a sum of positive squares in 4 ways, for example, as 15626209 + 56761156 = 3953^2 + 7534^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72387365 - 2²² = 68193061 is a prime.

It is a super-2 number, since 2×72387365² = 10479861223286450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3812 + ... + 12621.

It is an arithmetic number, because the mean of its divisors is an integer number (10871091).

Almost surely, 2^72387365 is an apocalyptic number.

It is an amenable number.

72387365 is a deficient number, since it is larger than the sum of its proper divisors (14581363).

72387365 is a wasteful number, since it uses less digits than its factorization.

72387365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17319.

The product of its digits is 211680, while the sum is 41.

The square root of 72387365 is about 8508.0764571083. The cubic root of 72387365 is about 416.7614969934.

It can be divided in two parts, 723 and 87365, that added together give a palindrome (88088).

The spelling of 72387365 in words is "seventy-two million, three hundred eighty-seven thousand, three hundred sixty-five".