388999894 has 8 divisors (see below), whose sum is σ = 589165200. Its totient is φ = 192611496.

The previous prime is 388999861. The next prime is 388999903. The reversal of 388999894 is 498999883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×388999894² = 302641835064022472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943969 + ... + 944380.

It is an arithmetic number, because the mean of its divisors is an integer number (73645650).

Almost surely, 2^388999894 is an apocalyptic number.

388999894 is a deficient number, since it is larger than the sum of its proper divisors (200165306).

388999894 is a wasteful number, since it uses less digits than its factorization.

388999894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888454.

The product of its digits is 40310784, while the sum is 67.

The square root of 388999894 is about 19723.0802361092. The cubic root of 388999894 is about 729.9892998995.

The spelling of 388999894 in words is "three hundred eighty-eight million, nine hundred ninety-nine thousand, eight hundred ninety-four".