72399670 has 16 divisors (see below), whose sum is σ = 148936608. Its totient is φ = 24822720.

The previous prime is 72399641. The next prime is 72399697. The reversal of 72399670 is 7699327.

It is a super-2 number, since 2×72399670² = 10483424432217800, which contains 22 as substring.

It is a zygodrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517071 + ... + 517210.

It is an arithmetic number, because the mean of its divisors is an integer number (9308538).

Almost surely, 2^72399670 is an apocalyptic number.

72399670 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72399670 is an abundant number, since it is smaller than the sum of its proper divisors (76536938).

72399670 is a wasteful number, since it uses less digits than its factorization.

72399670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034295.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 72399670 is about 8508.7995628056. The cubic root of 72399670 is about 416.7851105051.

The spelling of 72399670 in words is "seventy-two million, three hundred ninety-nine thousand, six hundred seventy".