72620530 has 16 divisors (see below), whose sum is σ = 131263704. Its totient is φ = 28926720.

The previous prime is 72620521. The next prime is 72620531. The reversal of 72620530 is 3502627.

It can be written as a sum of positive squares in 4 ways, for example, as 59954049 + 12666481 = 7743^2 + 3559^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72620495 and 72620504.

It is not an unprimeable number, because it can be changed into a prime (72620531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12657 + ... + 17476.

Almost surely, 2^72620530 is an apocalyptic number.

72620530 is a deficient number, since it is larger than the sum of its proper divisors (58643174).

72620530 is a wasteful number, since it uses less digits than its factorization.

72620530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30381.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 72620530 is about 8521.7680090460. The cubic root of 72620530 is about 417.2084904970.

The spelling of 72620530 in words is "seventy-two million, six hundred twenty thousand, five hundred thirty".