388253816 has 8 divisors (see below), whose sum is σ = 727975920. Its totient is φ = 194126904.

The previous prime is 388253759. The next prime is 388253843. The reversal of 388253816 is 618352883.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24265856 + ... + 24265871.

It is an arithmetic number, because the mean of its divisors is an integer number (90996990).

Almost surely, 2^388253816 is an apocalyptic number.

It is an amenable number.

388253816 is a deficient number, since it is larger than the sum of its proper divisors (339722104).

388253816 is a wasteful number, since it uses less digits than its factorization.

388253816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48531733 (or 48531729 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 388253816 is about 19704.1573278331. The cubic root of 388253816 is about 729.5223096122.

The spelling of 388253816 in words is "three hundred eighty-eight million, two hundred fifty-three thousand, eight hundred sixteen".