385991516 has 12 divisors (see below), whose sum is σ = 677328288. Its totient is φ = 192469152.

The previous prime is 385991513. The next prime is 385991539. The reversal of 385991516 is 615199583.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385991513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130001 + ... + 132936.

It is an arithmetic number, because the mean of its divisors is an integer number (56444024).

Almost surely, 2^385991516 is an apocalyptic number.

It is an amenable number.

385991516 is a deficient number, since it is larger than the sum of its proper divisors (291336772).

385991516 is a wasteful number, since it uses less digits than its factorization.

385991516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263308 (or 263306 counting only the distinct ones).

The product of its digits is 291600, while the sum is 47.

The square root of 385991516 is about 19646.6667910870. Note that the first 3 decimals coincide. The cubic root of 385991516 is about 728.1026075033.

The spelling of 385991516 in words is "three hundred eighty-five million, nine hundred ninety-one thousand, five hundred sixteen".