165274380 has 72 divisors (see below), whose sum is σ = 506351664. Its totient is φ = 43632000.

The previous prime is 165274379. The next prime is 165274397. The reversal of 165274380 is 83472561.

165274380 is a `hidden beast` number, since 1 + 6 + 5 + 274 + 380 = 666.

165274380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) 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 (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13635 + ... + 22725.

It is an arithmetic number, because the mean of its divisors is an integer number (7032662).

Almost surely, 2^165274380 is an apocalyptic number.

165274380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165274380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253175832).

165274380 is an abundant number, since it is smaller than the sum of its proper divisors (341077284).

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

165274380 is a wasteful number, since it uses less digits than its factorization.

165274380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9207 (or 9202 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 165274380 is about 12855.9083693063. The cubic root of 165274380 is about 548.7845113663.

The spelling of 165274380 in words is "one hundred sixty-five million, two hundred seventy-four thousand, three hundred eighty".