38192390640 has 60 divisors (see below), whose sum is σ = 128262780984. Its totient is φ = 10184637312.

The previous prime is 38192390617. The next prime is 38192390641. The reversal of 38192390640 is 4609329183.

It is a happy number.

38192390640 is a `hidden beast` number, since 38 + 192 + 390 + 6 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38192390641) 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, 26521774 + ... + 26523213.

Almost surely, 2^38192390640 is an apocalyptic number.

38192390640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38192390640 is an abundant number, since it is smaller than the sum of its proper divisors (90070390344).

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

38192390640 is a wasteful number, since it uses less digits than its factorization.

38192390640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53045006 (or 53044997 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 38192390640 in words is "thirty-eight billion, one hundred ninety-two million, three hundred ninety thousand, six hundred forty".