165630140 has 36 divisors (see below), whose sum is σ = 376644744. Its totient is φ = 61154496.

The previous prime is 165630139. The next prime is 165630151. The reversal of 165630140 is 41036561.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 21122 + ... + 27881.

It is an arithmetic number, because the mean of its divisors is an integer number (10462354).

Almost surely, 2^165630140 is an apocalyptic number.

165630140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165630140 is an abundant number, since it is smaller than the sum of its proper divisors (211014604).

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

165630140 is a wasteful number, since it uses less digits than its factorization.

165630140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49038 (or 49023 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 165630140 is about 12869.7373710577. The cubic root of 165630140 is about 549.1779896957.

The spelling of 165630140 in words is "one hundred sixty-five million, six hundred thirty thousand, one hundred forty".