388978475 has 12 divisors (see below), whose sum is σ = 484358880. Its totient is φ = 309876000.

The previous prime is 388978463. The next prime is 388978477. The reversal of 388978475 is 574879883.

It is not a de Polignac number, because 388978475 - 2¹² = 388974379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (388978477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26576 + ... + 38525.

It is an arithmetic number, because the mean of its divisors is an integer number (40363240).

Almost surely, 2^388978475 is an apocalyptic number.

388978475 is a deficient number, since it is larger than the sum of its proper divisors (95380405).

388978475 is a wasteful number, since it uses less digits than its factorization.

388978475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65350 (or 65345 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 59.

The square root of 388978475 is about 19722.5372353559. The cubic root of 388978475 is about 729.9759015001.

The spelling of 388978475 in words is "three hundred eighty-eight million, nine hundred seventy-eight thousand, four hundred seventy-five".