387238644 has 120 divisors (see below), whose sum is σ = 1103505480. Its totient is φ = 117697536.

The previous prime is 387238613. The next prime is 387238651. The reversal of 387238644 is 446832783.

It can be written as a sum of positive squares in 4 ways, for example, as 40832100 + 346406544 = 6390^2 + 18612^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 387238644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 374352 + ... + 375384.

It is an arithmetic number, because the mean of its divisors is an integer number (9195879).

Almost surely, 2^387238644 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 387238644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (551752740).

387238644 is an abundant number, since it is smaller than the sum of its proper divisors (716266836).

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

387238644 is a wasteful number, since it uses less digits than its factorization.

387238644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1140 counting only the distinct ones).

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

The square root of 387238644 is about 19678.3801162596. The cubic root of 387238644 is about 728.8859243337.

The spelling of 387238644 in words is "three hundred eighty-seven million, two hundred thirty-eight thousand, six hundred forty-four".