387823644 has 72 divisors (see below), whose sum is σ = 1059305520. Its totient is φ = 118927872.

The previous prime is 387823621. The next prime is 387823651. The reversal of 387823644 is 446328783.

It is a self number, because there is not a number n which added to its sum of digits gives 387823644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156487 + ... + 158945.

Almost surely, 2^387823644 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 387823644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529652760).

387823644 is an abundant number, since it is smaller than the sum of its proper divisors (671481876).

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

387823644 is a wasteful number, since it uses less digits than its factorization.

387823644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819 (or 2814 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 387823644 is about 19693.2385350912. The cubic root of 387823644 is about 729.2527814238.

The spelling of 387823644 in words is "three hundred eighty-seven million, eight hundred twenty-three thousand, six hundred forty-four".