165502380 has 24 divisors (see below), whose sum is σ = 463406832. Its totient is φ = 44133952.

The previous prime is 165502373. The next prime is 165502409. The reversal of 165502380 is 83205561.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1379127 + ... + 1379246.

It is an arithmetic number, because the mean of its divisors is an integer number (19308618).

Almost surely, 2^165502380 is an apocalyptic number.

165502380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165502380 is an abundant number, since it is smaller than the sum of its proper divisors (297904452).

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

165502380 is a wasteful number, since it uses less digits than its factorization.

165502380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758385 (or 2758383 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 165502380 is about 12864.7728312629. The cubic root of 165502380 is about 549.0367492429.

The spelling of 165502380 in words is "one hundred sixty-five million, five hundred two thousand, three hundred eighty".