385789887 has 18 divisors (see below), whose sum is σ = 648232728. Its totient is φ = 220451112.

The previous prime is 385789883. The next prime is 385789949. The reversal of 385789887 is 788987583.

It is a happy number.

It is not a de Polignac number, because 385789887 - 2² = 385789883 is a prime.

It is a super-2 number, since 2×385789887² = 297667673822945538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385789883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 436963 + ... + 437844.

Almost surely, 2^385789887 is an apocalyptic number.

385789887 is a deficient number, since it is larger than the sum of its proper divisors (262442841).

385789887 is a wasteful number, since it uses less digits than its factorization.

385789887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874827 (or 874817 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 63.

The square root of 385789887 is about 19641.5347414605. The cubic root of 385789887 is about 727.9758066418.

The spelling of 385789887 in words is "three hundred eighty-five million, seven hundred eighty-nine thousand, eight hundred eighty-seven".