388307738 has 32 divisors (see below), whose sum is σ = 741605760. Its totient is φ = 148317120.

The previous prime is 388307737. The next prime is 388307747. The reversal of 388307738 is 837703883.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 388307692 and 388307701.

It is not an unprimeable number, because it can be changed into a prime (388307737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31508 + ... + 42063.

It is an arithmetic number, because the mean of its divisors is an integer number (23175180).

Almost surely, 2^388307738 is an apocalyptic number.

388307738 is a deficient number, since it is larger than the sum of its proper divisors (353298022).

388307738 is a wasteful number, since it uses less digits than its factorization.

388307738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73622.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 388307738 is about 19705.5255702557. The cubic root of 388307738 is about 729.5560808888.

The spelling of 388307738 in words is "three hundred eighty-eight million, three hundred seven thousand, seven hundred thirty-eight".