326623440 has 320 divisors, whose sum is σ = 1231921152. Its totient is φ = 70502400.

The previous prime is 326623421. The next prime is 326623519. The reversal of 326623440 is 44326623.

It is a happy number.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 326623398 and 326623407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1063767 + ... + 1064073.

Almost surely, 2^326623440 is an apocalyptic number.

326623440 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 326623440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (615960576).

326623440 is an abundant number, since it is smaller than the sum of its proper divisors (905297712).

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

326623440 is a wasteful number, since it uses less digits than its factorization.

326623440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 326623440 is about 18072.7264130236. The cubic root of 326623440 is about 688.6773233240.

The spelling of 326623440 in words is "three hundred twenty-six million, six hundred twenty-three thousand, four hundred forty".