72428626 has 8 divisors (see below), whose sum is σ = 109195020. Its totient is φ = 36030288.

The previous prime is 72428623. The next prime is 72428659. The reversal of 72428626 is 62682427.

It can be written as a sum of positive squares in 2 ways, for example, as 52635025 + 19793601 = 7255^2 + 4449^2 .

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 (72428623) 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, 91521 + ... + 92308.

Almost surely, 2^72428626 is an apocalyptic number.

72428626 is a deficient number, since it is larger than the sum of its proper divisors (36766394).

72428626 is a wasteful number, since it uses less digits than its factorization.

72428626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184028.

The product of its digits is 64512, while the sum is 37.

The square root of 72428626 is about 8510.5009253275. The cubic root of 72428626 is about 416.8406670250.

The spelling of 72428626 in words is "seventy-two million, four hundred twenty-eight thousand, six hundred twenty-six".