385555580 has 48 divisors (see below), whose sum is σ = 886878720. Its totient is φ = 140141568.

The previous prime is 385555579. The next prime is 385555607. The reversal of 385555580 is 85555583.

It is a happy number.

It is a super-3 number, since 3×385555580³ (a number of 27 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 9692 + ... + 29411.

It is an arithmetic number, because the mean of its divisors is an integer number (18476640).

Almost surely, 2^385555580 is an apocalyptic number.

It is an amenable number.

385555580 is an abundant number, since it is smaller than the sum of its proper divisors (501323140).

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

385555580 is a wasteful number, since it uses less digits than its factorization.

385555580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39158 (or 39156 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 44.

The square root of 385555580 is about 19635.5692558174. The cubic root of 385555580 is about 727.8283996583.

The spelling of 385555580 in words is "three hundred eighty-five million, five hundred fifty-five thousand, five hundred eighty".