38123131428 has 36 divisors (see below), whose sum is σ = 96823538448. Its totient is φ = 12647481840.

The previous prime is 38123131351. The next prime is 38123131429. The reversal of 38123131428 is 82413132183.

38123131428 is a `hidden beast` number, since 3 + 81 + 23 + 131 + 428 = 666.

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

It is a super-2 number, since 2×38123131428² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 38123131392 and 38123131401.

It is not an unprimeable number, because it can be changed into a prime (38123131429) 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, 2501826 + ... + 2517017.

Almost surely, 2^38123131428 is an apocalyptic number.

It is an amenable number.

38123131428 is an abundant number, since it is smaller than the sum of its proper divisors (58700407020).

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

38123131428 is a wasteful number, since it uses less digits than its factorization.

38123131428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5019064 (or 5019059 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The spelling of 38123131428 in words is "thirty-eight billion, one hundred twenty-three million, one hundred thirty-one thousand, four hundred twenty-eight".