390239808 has 112 divisors (see below), whose sum is σ = 1191889920. Its totient is φ = 110375424.

The previous prime is 390239789. The next prime is 390239867. The reversal of 390239808 is 808932093.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 390239808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137023 + ... + 139841.

Almost surely, 2^390239808 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 390239808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595944960).

390239808 is an abundant number, since it is smaller than the sum of its proper divisors (801650112).

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

390239808 is a wasteful number, since it uses less digits than its factorization.

390239808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944 (or 2934 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 390239808 is about 19754.4883001307. The cubic root of 390239808 is about 730.7640764395.

The spelling of 390239808 in words is "three hundred ninety million, two hundred thirty-nine thousand, eight hundred eight".