326533680 has 280 divisors, whose sum is σ = 1244183760. Its totient is φ = 79004160.

The previous prime is 326533673. The next prime is 326533693. The reversal of 326533680 is 86335623.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 641266 + ... + 641774.

Almost surely, 2^326533680 is an apocalyptic number.

326533680 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 326533680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622091880).

326533680 is an abundant number, since it is smaller than the sum of its proper divisors (917650080).

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

326533680 is a wasteful number, since it uses less digits than its factorization.

326533680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 326533680 is about 18070.2429424731. The cubic root of 326533680 is about 688.6142319754.

The spelling of 326533680 in words is "three hundred twenty-six million, five hundred thirty-three thousand, six hundred eighty".