388768007640 has 32 divisors (see below), whose sum is σ = 1166304023280. Its totient is φ = 103671468672.

The previous prime is 388768007633. The next prime is 388768007657. The reversal of 388768007640 is 46700867883.

It is a super-2 number, since 2×388768007640² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1619866579 + ... + 1619866818.

Almost surely, 2^388768007640 is an apocalyptic number.

388768007640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388768007640 is an abundant number, since it is smaller than the sum of its proper divisors (777536015640).

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

388768007640 is a wasteful number, since it uses less digits than its factorization.

388768007640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239733411 (or 3239733407 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 57.

The spelling of 388768007640 in words is "three hundred eighty-eight billion, seven hundred sixty-eight million, seven thousand, six hundred forty".