326303640 has 320 divisors, whose sum is σ = 1209922560. Its totient is φ = 78382080.

The previous prime is 326303623. The next prime is 326303687. The reversal of 326303640 is 46303623.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2569257 + ... + 2569383.

It is an arithmetic number, because the mean of its divisors is an integer number (3781008).

Almost surely, 2^326303640 is an apocalyptic number.

326303640 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 326303640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604961280).

326303640 is an abundant number, since it is smaller than the sum of its proper divisors (883618920).

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

326303640 is a wasteful number, since it uses less digits than its factorization.

326303640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

The square root of 326303640 is about 18063.8766603407. The cubic root of 326303640 is about 688.4524865043.

The spelling of 326303640 in words is "three hundred twenty-six million, three hundred three thousand, six hundred forty".