387137844 has 54 divisors (see below), whose sum is σ = 1032849090. Its totient is φ = 122249952.

The previous prime is 387137833. The next prime is 387137851. The reversal of 387137844 is 448731783.

It can be written as a sum of positive squares in only one way, i.e., 229886244 + 157251600 = 15162^2 + 12540^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 387137844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1899 + ... + 27890.

It is an arithmetic number, because the mean of its divisors is an integer number (19126835).

Almost surely, 2^387137844 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 387137844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (516424545).

387137844 is an abundant number, since it is smaller than the sum of its proper divisors (645711246).

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

387137844 is a wasteful number, since it uses less digits than its factorization.

387137844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29837 (or 29813 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 387137844 is about 19675.8187631417. The cubic root of 387137844 is about 728.8226747259.

The spelling of 387137844 in words is "three hundred eighty-seven million, one hundred thirty-seven thousand, eight hundred forty-four".