390197808 has 240 divisors, whose sum is σ = 1466739456. Its totient is φ = 93519360.

The previous prime is 390197789. The next prime is 390197833. The reversal of 390197808 is 808791093.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142791 + ... + 145497.

Almost surely, 2^390197808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390197808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733369728).

390197808 is an abundant number, since it is smaller than the sum of its proper divisors (1076541648).

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

390197808 is a wasteful number, since it uses less digits than its factorization.

390197808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752 (or 2743 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 390197808 is about 19753.4252219710. The cubic root of 390197808 is about 730.7378590626.

The spelling of 390197808 in words is "three hundred ninety million, one hundred ninety-seven thousand, eight hundred eight".