388776378720 has 96 divisors (see below), whose sum is σ = 1226466293472. Its totient is φ = 103519567872.

The previous prime is 388776378703. The next prime is 388776378721. The reversal of 388776378720 is 27873677883.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×388776378720² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388776378721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278707 + ... + 924786.

It is an arithmetic number, because the mean of its divisors is an integer number (12775690557).

Almost surely, 2^388776378720 is an apocalyptic number.

388776378720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388776378720 is an abundant number, since it is smaller than the sum of its proper divisors (837689914752).

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

388776378720 is a wasteful number, since it uses less digits than its factorization.

388776378720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204184 (or 1204176 counting only the distinct ones).

The product of its (nonzero) digits is 132765696, while the sum is 66.

The spelling of 388776378720 in words is "three hundred eighty-eight billion, seven hundred seventy-six million, three hundred seventy-eight thousand, seven hundred twenty".