72653570 has 32 divisors (see below), whose sum is σ = 146529216. Its totient is φ = 25704000.

The previous prime is 72653569. The next prime is 72653579. The reversal of 72653570 is 7535627.

It is a self number, because there is not a number n which added to its sum of digits gives 72653570.

It is not an unprimeable number, because it can be changed into a prime (72653579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4856 + ... + 12995.

It is an arithmetic number, because the mean of its divisors is an integer number (4579038).

Almost surely, 2^72653570 is an apocalyptic number.

72653570 is an abundant number, since it is smaller than the sum of its proper divisors (73875646).

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

72653570 is a wasteful number, since it uses less digits than its factorization.

72653570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17906.

The product of its (nonzero) digits is 44100, while the sum is 35.

The square root of 72653570 is about 8523.7063534592. The cubic root of 72653570 is about 417.2717530416.

The spelling of 72653570 in words is "seventy-two million, six hundred fifty-three thousand, five hundred seventy".