387777749072 has 40 divisors (see below), whose sum is σ = 860700120000. Its totient is φ = 165793807872.

The previous prime is 387777749033. The next prime is 387777749083. The reversal of 387777749072 is 270947777783.

It is a super-4 number, since 4×387777749072⁴ (a number of 47 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 387777748993 and 387777749011.

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, 4084697 + ... + 4178552.

It is an arithmetic number, because the mean of its divisors is an integer number (21517503000).

Almost surely, 2^387777749072 is an apocalyptic number.

It is an amenable number.

387777749072 is an abundant number, since it is smaller than the sum of its proper divisors (472922370928).

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

387777749072 is a wasteful number, since it uses less digits than its factorization.

387777749072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8263683 (or 8263677 counting only the distinct ones).

The product of its (nonzero) digits is 203297472, while the sum is 68.

The spelling of 387777749072 in words is "three hundred eighty-seven billion, seven hundred seventy-seven million, seven hundred forty-nine thousand, seventy-two".