400371139 has 4 divisors (see below), whose sum is σ = 457567024. Its totient is φ = 343175256.

The previous prime is 400371119. The next prime is 400371149. The reversal of 400371139 is 931173004.

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

It is a cyclic number.

It is not a de Polignac number, because 400371139 - 2²¹ = 398273987 is a prime.

It is a super-3 number, since 3×400371139³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400371119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28597932 + ... + 28597945.

It is an arithmetic number, because the mean of its divisors is an integer number (114391756).

Almost surely, 2^400371139 is an apocalyptic number.

400371139 is a deficient number, since it is larger than the sum of its proper divisors (57195885).

400371139 is an equidigital number, since it uses as much as digits as its factorization.

400371139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57195884.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 400371139 is about 20009.2763237454. The cubic root of 400371139 is about 737.0341105791.

The spelling of 400371139 in words is "four hundred million, three hundred seventy-one thousand, one hundred thirty-nine".