388351994 has 8 divisors (see below), whose sum is σ = 582826260. Its totient is φ = 194076576.

The previous prime is 388351993. The next prime is 388352009. The reversal of 388351994 is 499153883.

It can be written as a sum of positive squares in 2 ways, for example, as 375855769 + 12496225 = 19387^2 + 3535^2 .

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

It is not an unprimeable number, because it can be changed into a prime (388351993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44729 + ... + 52700.

Almost surely, 2^388351994 is an apocalyptic number.

388351994 is a deficient number, since it is larger than the sum of its proper divisors (194474266).

388351994 is a wasteful number, since it uses less digits than its factorization.

388351994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99424.

The product of its digits is 933120, while the sum is 50.

The square root of 388351994 is about 19706.6484720259. The cubic root of 388351994 is about 729.5837960266.

The spelling of 388351994 in words is "three hundred eighty-eight million, three hundred fifty-one thousand, nine hundred ninety-four".