72283621 has 8 divisors (see below), whose sum is σ = 73493280. Its totient is φ = 71082192.

The previous prime is 72283613. The next prime is 72283633. The reversal of 72283621 is 12638227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72283621 - 2³ = 72283613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72283691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17106 + ... + 20908.

It is an arithmetic number, because the mean of its divisors is an integer number (9186660).

Almost surely, 2^72283621 is an apocalyptic number.

It is an amenable number.

72283621 is a deficient number, since it is larger than the sum of its proper divisors (1209659).

72283621 is a wasteful number, since it uses less digits than its factorization.

72283621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115.

The product of its digits is 8064, while the sum is 31.

The square root of 72283621 is about 8501.9774758582. The cubic root of 72283621 is about 416.5623039602.

The spelling of 72283621 in words is "seventy-two million, two hundred eighty-three thousand, six hundred twenty-one".