38406992247 has 48 divisors (see below), whose sum is σ = 61863852960. Its totient is φ = 22798105344.

The previous prime is 38406992227. The next prime is 38406992249. The reversal of 38406992247 is 74229960483.

38406992247 is a `hidden beast` number, since 3 + 8 + 406 + 9 + 9 + 224 + 7 = 666.

It is not a de Polignac number, because 38406992247 - 2²⁶ = 38339883383 is a prime.

It is a super-2 number, since 2×38406992247² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 38406992193 and 38406992202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38406992249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3941193 + ... + 3950925.

It is an arithmetic number, because the mean of its divisors is an integer number (1288830270).

Almost surely, 2^38406992247 is an apocalyptic number.

38406992247 is a deficient number, since it is larger than the sum of its proper divisors (23456860713).

38406992247 is a wasteful number, since it uses less digits than its factorization.

38406992247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10944 (or 10941 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 38406992247 in words is "thirty-eight billion, four hundred six million, nine hundred ninety-two thousand, two hundred forty-seven".