388701993 has 8 divisors (see below), whose sum is σ = 536140800. Its totient is φ = 250198928.

The previous prime is 388701977. The next prime is 388702049. The reversal of 388701993 is 399107883.

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

It is a cyclic number.

It is not a de Polignac number, because 388701993 - 2⁴ = 388701977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (388701953) 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, 2233833 + ... + 2234006.

It is an arithmetic number, because the mean of its divisors is an integer number (67017600).

Almost surely, 2^388701993 is an apocalyptic number.

It is an amenable number.

388701993 is a deficient number, since it is larger than the sum of its proper divisors (147438807).

388701993 is a wasteful number, since it uses less digits than its factorization.

388701993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4467871.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 388701993 is about 19715.5266985186. The cubic root of 388701993 is about 729.8029073222.

The spelling of 388701993 in words is "three hundred eighty-eight million, seven hundred one thousand, nine hundred ninety-three".