326539920 has 120 divisors (see below), whose sum is σ = 1177585344. Its totient is φ = 74635008.

The previous prime is 326539919. The next prime is 326539921. The reversal of 326539920 is 29935623.

It is an interprime number because it is at equal distance from previous prime (326539919) and next prime (326539921).

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (326539921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2124 + ... + 25643.

Almost surely, 2^326539920 is an apocalyptic number.

326539920 is a gapful number since it is divisible by the number (30) 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 326539920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (588792672).

326539920 is an abundant number, since it is smaller than the sum of its proper divisors (851045424).

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

326539920 is a wasteful number, since it uses less digits than its factorization.

326539920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27797 (or 27784 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 39.

The square root of 326539920 is about 18070.4156011974. The cubic root of 326539920 is about 688.6186183789.

The spelling of 326539920 in words is "three hundred twenty-six million, five hundred thirty-nine thousand, nine hundred twenty".