326972394 has 72 divisors (see below), whose sum is σ = 827089380. Its totient is φ = 93082752.

The previous prime is 326972357. The next prime is 326972413. The reversal of 326972394 is 493279623.

326972394 is a `hidden beast` number, since 326 + 97 + 239 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 316377369 + 10595025 = 17787^2 + 3255^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 342622 + ... + 343574.

Almost surely, 2^326972394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 326972394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413544690).

326972394 is an abundant number, since it is smaller than the sum of its proper divisors (500116986).

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

326972394 is a wasteful number, since it uses less digits than its factorization.

326972394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364 (or 1354 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 326972394 is about 18082.3779962703. The cubic root of 326972394 is about 688.9224896183.

The spelling of 326972394 in words is "three hundred twenty-six million, nine hundred seventy-two thousand, three hundred ninety-four".