388750381 has 4 divisors (see below), whose sum is σ = 389313664. Its totient is φ = 388187100.

The previous prime is 388750361. The next prime is 388750403. The reversal of 388750381 is 183057883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 388750381 - 2²¹ = 386653229 is a prime.

It is a super-2 number, since 2×388750381² = 302253717455290322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388750321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280605 + ... + 281986.

It is an arithmetic number, because the mean of its divisors is an integer number (97328416).

Almost surely, 2^388750381 is an apocalyptic number.

It is an amenable number.

388750381 is a deficient number, since it is larger than the sum of its proper divisors (563283).

388750381 is an equidigital number, since it uses as much as digits as its factorization.

388750381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563282.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 388750381 is about 19716.7538149666. The cubic root of 388750381 is about 729.8331895079.

The spelling of 388750381 in words is "three hundred eighty-eight million, seven hundred fifty thousand, three hundred eighty-one".