326665290 has 192 divisors, whose sum is σ = 983162880. Its totient is φ = 67962240.

The previous prime is 326665289. The next prime is 326665307. The reversal of 326665290 is 92566623.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2350041 + ... + 2350179.

It is an arithmetic number, because the mean of its divisors is an integer number (5120640).

Almost surely, 2^326665290 is an apocalyptic number.

326665290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 326665290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491581440).

326665290 is an abundant number, since it is smaller than the sum of its proper divisors (656497590).

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

326665290 is a wasteful number, since it uses less digits than its factorization.

326665290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 326665290 is about 18073.8841979249. The cubic root of 326665290 is about 688.7067352926.

The spelling of 326665290 in words is "three hundred twenty-six million, six hundred sixty-five thousand, two hundred ninety".