329531490 has 80 divisors (see below), whose sum is σ = 898372728. Its totient is φ = 86655744.

The previous prime is 329531483. The next prime is 329531537. The reversal of 329531490 is 94135923.

It is a happy number.

329531490 is a `hidden beast` number, since 32 + 9 + 531 + 4 + 90 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 186896241 + 142635249 = 13671^2 + 11943^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 56344 + ... + 61916.

Almost surely, 2^329531490 is an apocalyptic number.

329531490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 329531490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449186364).

329531490 is an abundant number, since it is smaller than the sum of its proper divisors (568841238).

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

329531490 is a wasteful number, since it uses less digits than its factorization.

329531490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5665 (or 5656 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 329531490 is about 18153.0022310361. The cubic root of 329531490 is about 690.7151375700.

It can be divided in two parts, 32953 and 1490, that added together give a palindrome (34443).

The spelling of 329531490 in words is "three hundred twenty-nine million, five hundred thirty-one thousand, four hundred ninety".