385665560 has 32 divisors (see below), whose sum is σ = 991712160. Its totient is φ = 132228096.

The previous prime is 385665547. The next prime is 385665563. The reversal of 385665560 is 65566583.

It is a super-2 number, since 2×385665560² = 297475848340227200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385665563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688409 + ... + 688968.

It is an arithmetic number, because the mean of its divisors is an integer number (30991005).

Almost surely, 2^385665560 is an apocalyptic number.

It is an amenable number.

385665560 is an abundant number, since it is smaller than the sum of its proper divisors (606046600).

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

385665560 is a wasteful number, since it uses less digits than its factorization.

385665560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377395 (or 1377391 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

The square root of 385665560 is about 19638.3695860934. The cubic root of 385665560 is about 727.8975975999.

The spelling of 385665560 in words is "three hundred eighty-five million, six hundred sixty-five thousand, five hundred sixty".