326581632 has 160 divisors (see below), whose sum is σ = 1047095280. Its totient is φ = 100445184.

The previous prime is 326581631. The next prime is 326581649. The reversal of 326581632 is 236185623.

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 not an unprimeable number, because it can be changed into a prime (326581631) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 133573 + ... + 135995.

Almost surely, 2^326581632 is an apocalyptic number.

326581632 is a gapful number since it is divisible by the number (32) 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 326581632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523547640).

326581632 is an abundant number, since it is smaller than the sum of its proper divisors (720513648).

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

326581632 is a wasteful number, since it uses less digits than its factorization.

326581632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2462 (or 2441 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 326581632 is about 18071.5697159931. The cubic root of 326581632 is about 688.6479383641.

The spelling of 326581632 in words is "three hundred twenty-six million, five hundred eighty-one thousand, six hundred thirty-two".