390503680 has 144 divisors (see below), whose sum is σ = 1096107264. Its totient is φ = 130498560.

The previous prime is 390503677. The next prime is 390503717. The reversal of 390503680 is 86305093.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366829 + ... + 367891.

It is an arithmetic number, because the mean of its divisors is an integer number (7611856).

Almost surely, 2^390503680 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 390503680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (548053632).

390503680 is an abundant number, since it is smaller than the sum of its proper divisors (705603584).

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

390503680 is a wasteful number, since it uses less digits than its factorization.

390503680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 390503680 is about 19761.1659575036. The cubic root of 390503680 is about 730.9287484597.

The spelling of 390503680 in words is "three hundred ninety million, five hundred three thousand, six hundred eighty".