385660990 has 96 divisors (see below), whose sum is σ = 842444064. Its totient is φ = 125314560.

The previous prime is 385660967. The next prime is 385661011. The reversal of 385660990 is 99066583.

It is a self number, because there is not a number n which added to its sum of digits gives 385660990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1957572 + ... + 1957768.

It is an arithmetic number, because the mean of its divisors is an integer number (8775459).

Almost surely, 2^385660990 is an apocalyptic number.

385660990 is an abundant number, since it is smaller than the sum of its proper divisors (456783074).

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

385660990 is a wasteful number, since it uses less digits than its factorization.

385660990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 385660990 is about 19638.2532318941. The cubic root of 385660990 is about 727.8947224791.

It can be divided in two parts, 3856 and 60990, that added together give a palindrome (64846).

The spelling of 385660990 in words is "three hundred eighty-five million, six hundred sixty thousand, nine hundred ninety".