161589392 has 20 divisors (see below), whose sum is σ = 323876220. Its totient is φ = 78008448.

The previous prime is 161589349. The next prime is 161589401. The reversal of 161589392 is 293985161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59660176 + 101929216 = 7724^2 + 10096^2 .

It is a super-2 number, since 2×161589392² = 52222263213859328, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173663 + ... + 174590.

It is an arithmetic number, because the mean of its divisors is an integer number (16193811).

Almost surely, 2^161589392 is an apocalyptic number.

It is an amenable number.

161589392 is an abundant number, since it is smaller than the sum of its proper divisors (162286828).

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

161589392 is a wasteful number, since it uses less digits than its factorization.

161589392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348290 (or 348284 counting only the distinct ones).

The product of its digits is 116640, while the sum is 44.

The square root of 161589392 is about 12711.7816217869. The cubic root of 161589392 is about 544.6752176513.

The spelling of 161589392 in words is "one hundred sixty-one million, five hundred eighty-nine thousand, three hundred ninety-two".