392428136381 has 4 divisors (see below), whose sum is σ = 393463567200. Its totient is φ = 391392705564.

The previous prime is 392428136363. The next prime is 392428136383. The reversal of 392428136381 is 183631824293.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183631824293 = 289343 ⋅634651.

It is a cyclic number.

It is not a de Polignac number, because 392428136381 - 2²⁶ = 392361027517 is a prime.

It is a super-2 number, since 2×392428136381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (392428136383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517714841 + ... + 517715598.

It is an arithmetic number, because the mean of its divisors is an integer number (98365891800).

Almost surely, 2^392428136381 is an apocalyptic number.

It is an amenable number.

392428136381 is a deficient number, since it is larger than the sum of its proper divisors (1035430819).

392428136381 is a wasteful number, since it uses less digits than its factorization.

392428136381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035430818.

The product of its digits is 1492992, while the sum is 50.

The spelling of 392428136381 in words is "three hundred ninety-two billion, four hundred twenty-eight million, one hundred thirty-six thousand, three hundred eighty-one".