386991234 has 24 divisors (see below), whose sum is σ = 958264320. Its totient is φ = 110568888.

The previous prime is 386991229. The next prime is 386991239. The reversal of 386991234 is 432199683.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (386991229) and next prime (386991239).

It is a self number, because there is not a number n which added to its sum of digits gives 386991234.

It is not an unprimeable number, because it can be changed into a prime (386991239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1535554 + ... + 1535805.

It is an arithmetic number, because the mean of its divisors is an integer number (39927680).

Almost surely, 2^386991234 is an apocalyptic number.

386991234 is an abundant number, since it is smaller than the sum of its proper divisors (571273086).

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

386991234 is a wasteful number, since it uses less digits than its factorization.

386991234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3071374 (or 3071371 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 386991234 is about 19672.0927712331. The cubic root of 386991234 is about 728.7306608302.

The spelling of 386991234 in words is "three hundred eighty-six million, nine hundred ninety-one thousand, two hundred thirty-four".