390386628 has 60 divisors (see below), whose sum is σ = 1022511952. Its totient is φ = 129878640.

The previous prime is 390386617. The next prime is 390386651. The reversal of 390386628 is 826683093.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 254223 + ... + 255753.

Almost surely, 2^390386628 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 390386628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511255976).

390386628 is an abundant number, since it is smaller than the sum of its proper divisors (632125324).

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

390386628 is a wasteful number, since it uses less digits than its factorization.

390386628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334 (or 2323 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 390386628 is about 19758.2040681839. The cubic root of 390386628 is about 730.8557101196.

The spelling of 390386628 in words is "three hundred ninety million, three hundred eighty-six thousand, six hundred twenty-eight".