329243640 has 64 divisors (see below), whose sum is σ = 1077528960. Its totient is φ = 79816320.

The previous prime is 329243627. The next prime is 329243669. The reversal of 329243640 is 46342923.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123394 + ... + 126033.

It is an arithmetic number, because the mean of its divisors is an integer number (16836390).

Almost surely, 2^329243640 is an apocalyptic number.

329243640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

329243640 is an abundant number, since it is smaller than the sum of its proper divisors (748285320).

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

329243640 is a wasteful number, since it uses less digits than its factorization.

329243640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249452 (or 249448 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 329243640 is about 18145.0720582752. The cubic root of 329243640 is about 690.5139627933.

The spelling of 329243640 in words is "three hundred twenty-nine million, two hundred forty-three thousand, six hundred forty".