388145886 has 16 divisors (see below), whose sum is σ = 776563200. Its totient is φ = 129336728.

The previous prime is 388145809. The next prime is 388145899. The reversal of 388145886 is 688541883.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

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, 10525 + ... + 29783.

It is an arithmetic number, because the mean of its divisors is an integer number (48535200).

Almost surely, 2^388145886 is an apocalyptic number.

388145886 is an abundant number, since it is smaller than the sum of its proper divisors (388417314).

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

388145886 is a wasteful number, since it uses less digits than its factorization.

388145886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22623.

The product of its digits is 1474560, while the sum is 51.

The square root of 388145886 is about 19701.4183753353. The cubic root of 388145886 is about 729.4547038032.

The spelling of 388145886 in words is "three hundred eighty-eight million, one hundred forty-five thousand, eight hundred eighty-six".