72352090 has 8 divisors (see below), whose sum is σ = 130233780. Its totient is φ = 28940832.

The previous prime is 72352087. The next prime is 72352097. The reversal of 72352090 is 9025327.

72352090 = 3802² + 3803² + ... + 3806².

It can be written as a sum of positive squares in 2 ways, for example, as 65334889 + 7017201 = 8083^2 + 2649^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72352097) 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, 3617595 + ... + 3617614.

Almost surely, 2^72352090 is an apocalyptic number.

72352090 is a deficient number, since it is larger than the sum of its proper divisors (57881690).

72352090 is a wasteful number, since it uses less digits than its factorization.

72352090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7235216.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 72352090 is about 8506.0031742294. The cubic root of 72352090 is about 416.6937888123.

The spelling of 72352090 in words is "seventy-two million, three hundred fifty-two thousand, ninety".