384865690 has 32 divisors (see below), whose sum is σ = 756682560. Its totient is φ = 139776000.

The previous prime is 384865687. The next prime is 384865697. The reversal of 384865690 is 96568483.

It is a happy number.

It is a super-2 number, since 2×384865690² = 296243198678352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (384865697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113946 + ... + 117274.

It is an arithmetic number, because the mean of its divisors is an integer number (23646330).

Almost surely, 2^384865690 is an apocalyptic number.

384865690 is a deficient number, since it is larger than the sum of its proper divisors (371816870).

384865690 is a wasteful number, since it uses less digits than its factorization.

384865690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 384865690 is about 19617.9940360884. The cubic root of 384865690 is about 727.3940296673.

The spelling of 384865690 in words is "three hundred eighty-four million, eight hundred sixty-five thousand, six hundred ninety".