388973730 has 16 divisors (see below), whose sum is σ = 933537024. Its totient is φ = 103726320.

The previous prime is 388973701. The next prime is 388973737. The reversal of 388973730 is 37379883.

It is a super-2 number, since 2×388973730² = 302601125260225800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 388973730.

It is not an unprimeable number, because it can be changed into a prime (388973737) 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, 6482866 + ... + 6482925.

It is an arithmetic number, because the mean of its divisors is an integer number (58346064).

Almost surely, 2^388973730 is an apocalyptic number.

388973730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

388973730 is an abundant number, since it is smaller than the sum of its proper divisors (544563294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

388973730 is a wasteful number, since it uses less digits than its factorization.

388973730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12965801.

The product of its (nonzero) digits is 762048, while the sum is 48.

The square root of 388973730 is about 19722.4169411358. The cubic root of 388973730 is about 729.9729332555.

The spelling of 388973730 in words is "three hundred eighty-eight million, nine hundred seventy-three thousand, seven hundred thirty".