390655580 has 192 divisors, whose sum is σ = 1071221760. Its totient is φ = 116453376.

The previous prime is 390655567. The next prime is 390655591. The reversal of 390655580 is 85556093.

It is a super-3 number, since 3×390655580³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2396579 + ... + 2396741.

It is an arithmetic number, because the mean of its divisors is an integer number (5579280).

Almost surely, 2^390655580 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 390655580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535610880).

390655580 is an abundant number, since it is smaller than the sum of its proper divisors (680566180).

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

390655580 is a wasteful number, since it uses less digits than its factorization.

390655580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 390655580 is about 19765.0089805191. The cubic root of 390655580 is about 731.0235095674.

The spelling of 390655580 in words is "three hundred ninety million, six hundred fifty-five thousand, five hundred eighty".