388978372 has 6 divisors (see below), whose sum is σ = 680712158. Its totient is φ = 194489184.

The previous prime is 388978339. The next prime is 388978379. The reversal of 388978372 is 273879883.

It can be written as a sum of positive squares in only one way, i.e., 332187076 + 56791296 = 18226^2 + 7536^2 .

It is not an unprimeable number, because it can be changed into a prime (388978379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48622293 + ... + 48622300.

Almost surely, 2^388978372 is an apocalyptic number.

It is an amenable number.

388978372 is a deficient number, since it is larger than the sum of its proper divisors (291733786).

388978372 is a wasteful number, since it uses less digits than its factorization.

388978372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97244597 (or 97244595 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 55.

The square root of 388978372 is about 19722.5346241298. The cubic root of 388978372 is about 729.9758370685.

The spelling of 388978372 in words is "three hundred eighty-eight million, nine hundred seventy-eight thousand, three hundred seventy-two".