165683490 has 64 divisors (see below), whose sum is σ = 474218496. Its totient is φ = 36222912.

The previous prime is 165683489. The next prime is 165683509. The reversal of 165683490 is 94386561.

165683490 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12322 + ... + 21981.

It is an arithmetic number, because the mean of its divisors is an integer number (7409664).

Almost surely, 2^165683490 is an apocalyptic number.

165683490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165683490 is an abundant number, since it is smaller than the sum of its proper divisors (308535006).

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

165683490 is a wasteful number, since it uses less digits than its factorization.

165683490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34343.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 165683490 is about 12871.8098960480. The cubic root of 165683490 is about 549.2369473641.

It can be divided in two parts, 16 and 5683490, that added together give a triangular number (5683506 = T₃₃₇₁).

The spelling of 165683490 in words is "one hundred sixty-five million, six hundred eighty-three thousand, four hundred ninety".