38889474397 has 8 divisors (see below), whose sum is σ = 41179480056. Its totient is φ = 36599734272.

The previous prime is 38889474391. The next prime is 38889474473. The reversal of 38889474397 is 79347498883.

It can be written as a sum of positive squares in 4 ways, for example, as 19305990916 + 19583483481 = 138946^2 + 139941^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38889474397 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 (38889474391) 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, 289803 + ... + 402199.

It is an arithmetic number, because the mean of its divisors is an integer number (5147435007).

Almost surely, 2^38889474397 is an apocalyptic number.

It is an amenable number.

38889474397 is a deficient number, since it is larger than the sum of its proper divisors (2290005659).

38889474397 is a wasteful number, since it uses less digits than its factorization.

38889474397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132767.

The product of its digits is 292626432, while the sum is 70.

The spelling of 38889474397 in words is "thirty-eight billion, eight hundred eighty-nine million, four hundred seventy-four thousand, three hundred ninety-seven".