388930140 has 48 divisors (see below), whose sum is σ = 1210006560. Its totient is φ = 103714560.

The previous prime is 388930121. The next prime is 388930151. The reversal of 388930140 is 41039883.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 388930095 and 388930104.

It is a congruent 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, 359581 + ... + 360660.

It is an arithmetic number, because the mean of its divisors is an integer number (25208470).

Almost surely, 2^388930140 is an apocalyptic number.

388930140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388930140 is an abundant number, since it is smaller than the sum of its proper divisors (821076420).

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

388930140 is a wasteful number, since it uses less digits than its factorization.

388930140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720259 (or 720251 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 388930140 is about 19721.3118224929. The cubic root of 388930140 is about 729.9456643113.

The spelling of 388930140 in words is "three hundred eighty-eight million, nine hundred thirty thousand, one hundred forty".