161870844 has 24 divisors (see below), whose sum is σ = 377914320. Its totient is φ = 53926144.

The previous prime is 161870831. The next prime is 161870879. The reversal of 161870844 is 448078161.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29812 + ... + 34820.

It is an arithmetic number, because the mean of its divisors is an integer number (15746430).

Almost surely, 2^161870844 is an apocalyptic number.

It is an amenable number.

161870844 is an abundant number, since it is smaller than the sum of its proper divisors (216043476).

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

161870844 is a wasteful number, since it uses less digits than its factorization.

161870844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7709 (or 7707 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 161870844 is about 12722.8473228283. The cubic root of 161870844 is about 544.9912677107.

The spelling of 161870844 in words is "one hundred sixty-one million, eight hundred seventy thousand, eight hundred forty-four".