72256620 has 96 divisors (see below), whose sum is σ = 214663680. Its totient is φ = 18109440.

The previous prime is 72256589. The next prime is 72256627. The reversal of 72256620 is 2665227.

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

It is not an unprimeable number, because it can be changed into a prime (72256627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274609 + ... + 274871.

It is an arithmetic number, because the mean of its divisors is an integer number (2236080).

Almost surely, 2^72256620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72256620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107331840).

72256620 is an abundant number, since it is smaller than the sum of its proper divisors (142407060).

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

72256620 is a wasteful number, since it uses less digits than its factorization.

72256620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 72256620 is about 8500.3894028450. The cubic root of 72256620 is about 416.5104296011.

The spelling of 72256620 in words is "seventy-two million, two hundred fifty-six thousand, six hundred twenty".