38840393972 has 12 divisors (see below), whose sum is σ = 68346219396. Its totient is φ = 19312902720.

The previous prime is 38840393957. The next prime is 38840393987. The reversal of 38840393972 is 27939304883.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (38840393957) and next prime (38840393987).

It can be written as a sum of positive squares in 2 ways, for example, as 17046958096 + 21793435876 = 130564^2 + 147626^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26822753 + ... + 26824200.

It is an arithmetic number, because the mean of its divisors is an integer number (5695518283).

Almost surely, 2^38840393972 is an apocalyptic number.

It is an amenable number.

38840393972 is a deficient number, since it is larger than the sum of its proper divisors (29505825424).

38840393972 is a wasteful number, since it uses less digits than its factorization.

38840393972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53647138 (or 53647136 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 38840393972 in words is "thirty-eight billion, eight hundred forty million, three hundred ninety-three thousand, nine hundred seventy-two".