38287781604 has 36 divisors (see below), whose sum is σ = 96921131580. Its totient is φ = 12744379200.

The previous prime is 38287781579. The next prime is 38287781627. The reversal of 38287781604 is 40618778283.

It is a happy number.

38287781604 is a `hidden beast` number, since 3 + 8 + 28 + 7 + 7 + 8 + 1 + 604 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33911959104 + 4375822500 = 184152^2 + 66150^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 733359 + ... + 783830.

It is an arithmetic number, because the mean of its divisors is an integer number (2692253655).

Almost surely, 2^38287781604 is an apocalyptic number.

It is an amenable number.

38287781604 is an abundant number, since it is smaller than the sum of its proper divisors (58633349976).

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

38287781604 is a wasteful number, since it uses less digits than its factorization.

38287781604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517900 (or 1517895 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 38287781604 in words is "thirty-eight billion, two hundred eighty-seven million, seven hundred eighty-one thousand, six hundred four".