72489530 has 24 divisors (see below), whose sum is σ = 138368412. Its totient is φ = 27248384.

The previous prime is 72489481. The next prime is 72489551. The reversal of 72489530 is 3598427.

It can be written as a sum of positive squares in 6 ways, for example, as 21780889 + 50708641 = 4667^2 + 7121^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110684 + ... + 111336.

Almost surely, 2^72489530 is an apocalyptic number.

72489530 is a deficient number, since it is larger than the sum of its proper divisors (65878882).

72489530 is an equidigital number, since it uses as much as digits as its factorization.

72489530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 72489530 is about 8514.0783411947. The cubic root of 72489530 is about 416.9574723675.

The spelling of 72489530 in words is "seventy-two million, four hundred eighty-nine thousand, five hundred thirty".