381237564 has 12 divisors (see below), whose sum is σ = 889554344. Its totient is φ = 127079184.

The previous prime is 381237559. The next prime is 381237587. The reversal of 381237564 is 465732183.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15884887 + ... + 15884910.

Almost surely, 2^381237564 is an apocalyptic number.

It is an amenable number.

381237564 is an abundant number, since it is smaller than the sum of its proper divisors (508316780).

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

381237564 is a wasteful number, since it uses less digits than its factorization.

381237564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31769804 (or 31769802 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 381237564 is about 19525.3057338419. The cubic root of 381237564 is about 725.1010966432.

The spelling of 381237564 in words is "three hundred eighty-one million, two hundred thirty-seven thousand, five hundred sixty-four".