390490880 has 144 divisors (see below), whose sum is σ = 1041164544. Its totient is φ = 139345920.

The previous prime is 390490879. The next prime is 390490883. The reversal of 390490880 is 88094093.

It is not an unprimeable number, because it can be changed into a prime (390490883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515462 + ... + 516218.

Almost surely, 2^390490880 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 390490880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520582272).

390490880 is an abundant number, since it is smaller than the sum of its proper divisors (650673664).

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

390490880 is a wasteful number, since it uses less digits than its factorization.

390490880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 390490880 is about 19760.8420873201. The cubic root of 390490880 is about 730.9207622010.

The spelling of 390490880 in words is "three hundred ninety million, four hundred ninety thousand, eight hundred eighty".