326399280 has 40 divisors (see below), whose sum is σ = 1011838512. Its totient is φ = 87039744.

The previous prime is 326399267. The next prime is 326399287. The reversal of 326399280 is 82993623.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (326399287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679759 + ... + 680238.

Almost surely, 2^326399280 is an apocalyptic number.

326399280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

326399280 is an abundant number, since it is smaller than the sum of its proper divisors (685439232).

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

326399280 is a wasteful number, since it uses less digits than its factorization.

326399280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360013 (or 1360007 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 326399280 is about 18066.5237386720. The cubic root of 326399280 is about 688.5197420253.

The spelling of 326399280 in words is "three hundred twenty-six million, three hundred ninety-nine thousand, two hundred eighty".