161442684 has 36 divisors (see below), whose sum is σ = 439484136. Its totient is φ = 49674528.

The previous prime is 161442667. The next prime is 161442691. The reversal of 161442684 is 486244161.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172014 + ... + 172949.

Almost surely, 2^161442684 is an apocalyptic number.

It is an amenable number.

161442684 is an abundant number, since it is smaller than the sum of its proper divisors (278041452).

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

161442684 is a wasteful number, since it uses less digits than its factorization.

161442684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344986 (or 344981 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 161442684 is about 12706.0097591651. The cubic root of 161442684 is about 544.5103297501.

The spelling of 161442684 in words is "one hundred sixty-one million, four hundred forty-two thousand, six hundred eighty-four".