72364457 has 4 divisors (see below), whose sum is σ = 78943056. Its totient is φ = 65785860.

The previous prime is 72364433. The next prime is 72364477. The reversal of 72364457 is 75446327.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72364457 is a prime.

It is a super-2 number, since 2×72364457² = 10473229273809698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72364457.

It is not an unprimeable number, because it can be changed into a prime (72364477) 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, 3289283 + ... + 3289304.

It is an arithmetic number, because the mean of its divisors is an integer number (19735764).

Almost surely, 2^72364457 is an apocalyptic number.

It is an amenable number.

72364457 is a deficient number, since it is larger than the sum of its proper divisors (6578599).

72364457 is a wasteful number, since it uses less digits than its factorization.

72364457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6578598.

The product of its digits is 141120, while the sum is 38.

The square root of 72364457 is about 8506.7301003382. The cubic root of 72364457 is about 416.7175290088.

The spelling of 72364457 in words is "seventy-two million, three hundred sixty-four thousand, four hundred fifty-seven".