38406927864 has 64 divisors (see below), whose sum is σ = 101289715200. Its totient is φ = 12102241536.

The previous prime is 38406927863. The next prime is 38406927869. The reversal of 38406927864 is 46872960483.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38406927863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120172 + ... + 302084.

It is an arithmetic number, because the mean of its divisors is an integer number (1582651800).

Almost surely, 2^38406927864 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 38406927864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50644857600).

38406927864 is an abundant number, since it is smaller than the sum of its proper divisors (62882787336).

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

38406927864 is a wasteful number, since it uses less digits than its factorization.

38406927864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182404 (or 182400 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 57.

The spelling of 38406927864 in words is "thirty-eight billion, four hundred six million, nine hundred twenty-seven thousand, eight hundred sixty-four".