388950660 has 336 divisors, whose sum is σ = 1451364096. Its totient is φ = 85660416.

The previous prime is 388950649. The next prime is 388950673. The reversal of 388950660 is 66059883.

388950660 is a `hidden beast` number, since 3 + 8 + 89 + 506 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 3776169 + ... + 3776271.

It is an arithmetic number, because the mean of its divisors is an integer number (4319536).

Almost surely, 2^388950660 is an apocalyptic number.

388950660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388950660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725682048).

388950660 is an abundant number, since it is smaller than the sum of its proper divisors (1062413436).

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

388950660 is a wasteful number, since it uses less digits than its factorization.

388950660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 388950660 is about 19721.8320649984. The cubic root of 388950660 is about 729.9585014253.

The spelling of 388950660 in words is "three hundred eighty-eight million, nine hundred fifty thousand, six hundred sixty".