72970381 has 12 divisors (see below), whose sum is σ = 80438400. Its totient is φ = 66145640.

The previous prime is 72970357. The next prime is 72970397. The reversal of 72970381 is 18307927.

It is not a de Polignac number, because 72970381 - 2¹⁹ = 72446093 is a prime.

It is a super-2 number, since 2×72970381² = 10649353006570322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72970381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72970081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57330 + ... + 58588.

It is an arithmetic number, because the mean of its divisors is an integer number (6703200).

Almost surely, 2^72970381 is an apocalyptic number.

It is an amenable number.

72970381 is a deficient number, since it is larger than the sum of its proper divisors (7468019).

72970381 is a wasteful number, since it uses less digits than its factorization.

72970381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760 (or 1749 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 72970381 is about 8542.2702485932. The cubic root of 72970381 is about 417.8773878604.

The spelling of 72970381 in words is "seventy-two million, nine hundred seventy thousand, three hundred eighty-one".