388378770 has 64 divisors (see below), whose sum is σ = 1062875520. Its totient is φ = 89975808.

The previous prime is 388378763. The next prime is 388378777. The reversal of 388378770 is 77873883.

It is an interprime number because it is at equal distance from previous prime (388378763) and next prime (388378777).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (388378777) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22660 + ... + 35919.

It is an arithmetic number, because the mean of its divisors is an integer number (16607430).

Almost surely, 2^388378770 is an apocalyptic number.

388378770 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

388378770 is an abundant number, since it is smaller than the sum of its proper divisors (674496750).

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

388378770 is a wasteful number, since it uses less digits than its factorization.

388378770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58619.

The product of its (nonzero) digits is 1580544, while the sum is 51.

The square root of 388378770 is about 19707.3278249488. The cubic root of 388378770 is about 729.6005633640.

The spelling of 388378770 in words is "three hundred eighty-eight million, three hundred seventy-eight thousand, seven hundred seventy".