388706730 has 32 divisors (see below), whose sum is σ = 939168000. Its totient is φ = 102958272.

The previous prime is 388706729. The next prime is 388706761. The reversal of 388706730 is 37607883.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39010 + ... + 47949.

It is an arithmetic number, because the mean of its divisors is an integer number (29349000).

Almost surely, 2^388706730 is an apocalyptic number.

388706730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

388706730 is an abundant number, since it is smaller than the sum of its proper divisors (550461270).

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

388706730 is a wasteful number, since it uses less digits than its factorization.

388706730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87118.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 388706730 is about 19715.6468318947. The cubic root of 388706730 is about 729.8058719432.

The spelling of 388706730 in words is "three hundred eighty-eight million, seven hundred six thousand, seven hundred thirty".