387971345720 has 32 divisors (see below), whose sum is σ = 997640604000. Its totient is φ = 133018747008.

The previous prime is 387971345711. The next prime is 387971345803. The reversal of 387971345720 is 27543179783.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 692805695 + ... + 692806254.

It is an arithmetic number, because the mean of its divisors is an integer number (31176268875).

Almost surely, 2^387971345720 is an apocalyptic number.

It is an amenable number.

387971345720 is an abundant number, since it is smaller than the sum of its proper divisors (609669258280).

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

387971345720 is a wasteful number, since it uses less digits than its factorization.

387971345720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385611967 (or 1385611963 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 56.

The spelling of 387971345720 in words is "three hundred eighty-seven billion, nine hundred seventy-one million, three hundred forty-five thousand, seven hundred twenty".