38730972 has 72 divisors (see below), whose sum is σ = 105974400. Its totient is φ = 10977120.

The previous prime is 38730959. The next prime is 38730983. The reversal of 38730972 is 27903783.

It is a self number, because there is not a number n which added to its sum of digits gives 38730972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116847 + ... + 117177.

Almost surely, 2^38730972 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 38730972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52987200).

38730972 is an abundant number, since it is smaller than the sum of its proper divisors (67243428).

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

38730972 is a wasteful number, since it uses less digits than its factorization.

38730972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 38730972 is about 6223.4212455851. The cubic root of 38730972 is about 338.3395744654.

The spelling of 38730972 in words is "thirty-eight million, seven hundred thirty thousand, nine hundred seventy-two".