387263380644 has 96 divisors (see below), whose sum is σ = 1147995340800. Its totient is φ = 110593810080.

The previous prime is 387263380639. The next prime is 387263380663. The reversal of 387263380644 is 446083362783.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1474587 + ... + 1717245.

It is an arithmetic number, because the mean of its divisors is an integer number (11958284800).

Almost surely, 2^387263380644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387263380644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573997670400).

387263380644 is an abundant number, since it is smaller than the sum of its proper divisors (760731960156).

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

387263380644 is a wasteful number, since it uses less digits than its factorization.

387263380644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244790 (or 244782 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 54.

The spelling of 387263380644 in words is "three hundred eighty-seven billion, two hundred sixty-three million, three hundred eighty thousand, six hundred forty-four".