72621570 has 32 divisors (see below), whose sum is σ = 199191168. Its totient is φ = 16599168.

The previous prime is 72621559. The next prime is 72621581. The reversal of 72621570 is 7512627.

It is an interprime number because it is at equal distance from previous prime (72621559) and next prime (72621581).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172699 + ... + 173118.

It is an arithmetic number, because the mean of its divisors is an integer number (6224724).

Almost surely, 2^72621570 is an apocalyptic number.

72621570 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72621570 is an abundant number, since it is smaller than the sum of its proper divisors (126569598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72621570 is a wasteful number, since it uses less digits than its factorization.

72621570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345834.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 72621570 is about 8521.8290290289. The cubic root of 72621570 is about 417.2104821044.

The spelling of 72621570 in words is "seventy-two million, six hundred twenty-one thousand, five hundred seventy".