388970506 has 16 divisors (see below), whose sum is σ = 618148800. Its totient is φ = 182934720.

The previous prime is 388970501. The next prime is 388970531. The reversal of 388970506 is 605079883.

It is not an unprimeable number, because it can be changed into a prime (388970501) 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, 92845 + ... + 96943.

It is an arithmetic number, because the mean of its divisors is an integer number (38634300).

Almost surely, 2^388970506 is an apocalyptic number.

388970506 is the 12474-th centered pentagonal number.

388970506 is a deficient number, since it is larger than the sum of its proper divisors (229178294).

388970506 is a wasteful number, since it uses less digits than its factorization.

388970506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6909.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 388970506 is about 19722.3352065621. The cubic root of 388970506 is about 729.9709164619.

The spelling of 388970506 in words is "three hundred eighty-eight million, nine hundred seventy thousand, five hundred six".