388143834 has 16 divisors (see below), whose sum is σ = 836002272. Its totient is φ = 119428848.

The previous prime is 388143823. The next prime is 388143841. The reversal of 388143834 is 438341883.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2488024 + ... + 2488179.

It is an arithmetic number, because the mean of its divisors is an integer number (52250142).

Almost surely, 2^388143834 is an apocalyptic number.

388143834 is an abundant number, since it is smaller than the sum of its proper divisors (447858438).

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

388143834 is a wasteful number, since it uses less digits than its factorization.

388143834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4976221.

The product of its digits is 221184, while the sum is 42.

The square root of 388143834 is about 19701.3662977977. The cubic root of 388143834 is about 729.4534183383.

The spelling of 388143834 in words is "three hundred eighty-eight million, one hundred forty-three thousand, eight hundred thirty-four".