38440371842 has 4 divisors (see below), whose sum is σ = 57660557766. Its totient is φ = 19220185920.

The previous prime is 38440371839. The next prime is 38440371883. The reversal of 38440371842 is 24817304483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 26898952081 + 11541419761 = 164009^2 + 107431^2 .

It is a junction number, because it is equal to n+sod(n) for n = 38440371793 and 38440371802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9610092959 + ... + 9610092962.

Almost surely, 2^38440371842 is an apocalyptic number.

38440371842 is a deficient number, since it is larger than the sum of its proper divisors (19220185924).

38440371842 is a wasteful number, since it uses less digits than its factorization.

38440371842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19220185923.

The product of its (nonzero) digits is 516096, while the sum is 44.

The spelling of 38440371842 in words is "thirty-eight billion, four hundred forty million, three hundred seventy-one thousand, eight hundred forty-two".