388894413 has 8 divisors (see below), whose sum is σ = 545816800. Its totient is φ = 245617488.

The previous prime is 388894393. The next prime is 388894417. The reversal of 388894413 is 314498883.

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

It is not a de Polignac number, because 388894413 - 2⁸ = 388894157 is a prime.

It is a super-2 number, since 2×388894413² = 302477728925229138, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388894417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3411298 + ... + 3411411.

It is an arithmetic number, because the mean of its divisors is an integer number (68227100).

Almost surely, 2^388894413 is an apocalyptic number.

It is an amenable number.

388894413 is a deficient number, since it is larger than the sum of its proper divisors (156922387).

388894413 is a wasteful number, since it uses less digits than its factorization.

388894413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6822731.

The product of its digits is 663552, while the sum is 48.

The square root of 388894413 is about 19720.4060049483. The cubic root of 388894413 is about 729.9233127674.

The spelling of 388894413 in words is "three hundred eighty-eight million, eight hundred ninety-four thousand, four hundred thirteen".