38421449992 has 8 divisors (see below), whose sum is σ = 72040218750. Its totient is φ = 19210724992.

The previous prime is 38421449939. The next prime is 38421450019. The reversal of 38421449992 is 29994412483.

It can be written as a sum of positive squares in only one way, i.e., 35874632836 + 2546817156 = 189406^2 + 50466^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2401340617 + ... + 2401340632.

Almost surely, 2^38421449992 is an apocalyptic number.

It is an amenable number.

38421449992 is a deficient number, since it is larger than the sum of its proper divisors (33618768758).

38421449992 is a wasteful number, since it uses less digits than its factorization.

38421449992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4802681255 (or 4802681251 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 55.

The spelling of 38421449992 in words is "thirty-eight billion, four hundred twenty-one million, four hundred forty-nine thousand, nine hundred ninety-two".