400292139 has 8 divisors (see below), whose sum is σ = 574778512. Its totient is φ = 246333600.

The previous prime is 400292129. The next prime is 400292141. The reversal of 400292139 is 931292004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400292139 - 2¹⁵ = 400259371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400292129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5131912 + ... + 5131989.

It is an arithmetic number, because the mean of its divisors is an integer number (71847314).

Almost surely, 2^400292139 is an apocalyptic number.

400292139 is a deficient number, since it is larger than the sum of its proper divisors (174486373).

400292139 is a wasteful number, since it uses less digits than its factorization.

400292139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10263917.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 400292139 is about 20007.3021419681. The cubic root of 400292139 is about 736.9856309568.

It can be divided in two parts, 4002 and 92139, that added together give a triangular number (96141 = T₄₃₈).

The spelling of 400292139 in words is "four hundred million, two hundred ninety-two thousand, one hundred thirty-nine".