396161139 has 24 divisors (see below), whose sum is σ = 582274000. Its totient is φ = 239405760.

The previous prime is 396161137. The next prime is 396161197. The reversal of 396161139 is 931161693.

It is not a de Polignac number, because 396161139 - 2¹ = 396161137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 396161097 and 396161106.

It is not an unprimeable number, because it can be changed into a prime (396161137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142737 + ... + 145485.

Almost surely, 2^396161139 is an apocalyptic number.

396161139 is a deficient number, since it is larger than the sum of its proper divisors (186112861).

396161139 is a wasteful number, since it uses less digits than its factorization.

396161139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171 (or 3160 counting only the distinct ones).

The product of its digits is 26244, while the sum is 39.

The square root of 396161139 is about 19903.7971000510. The cubic root of 396161139 is about 734.4416380369.

It can be divided in two parts, 39616 and 1139, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 396161139 in words is "three hundred ninety-six million, one hundred sixty-one thousand, one hundred thirty-nine".