161426920 has 32 divisors (see below), whose sum is σ = 374929920. Its totient is φ = 62487360.

The previous prime is 161426911. The next prime is 161426927. The reversal of 161426920 is 29624161.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (161426927) 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, 63852 + ... + 66331.

It is an arithmetic number, because the mean of its divisors is an integer number (11716560).

Almost surely, 2^161426920 is an apocalyptic number.

161426920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161426920 is an abundant number, since it is smaller than the sum of its proper divisors (213503000).

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

161426920 is a wasteful number, since it uses less digits than its factorization.

161426920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130225 (or 130221 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 161426920 is about 12705.3894076490. The cubic root of 161426920 is about 544.4926063492.

The spelling of 161426920 in words is "one hundred sixty-one million, four hundred twenty-six thousand, nine hundred twenty".