381238524 has 72 divisors (see below), whose sum is σ = 1040326560. Its totient is φ = 117355392.

The previous prime is 381238523. The next prime is 381238567. The reversal of 381238524 is 425832183.

381238524 is a `hidden beast` number, since 3 + 8 + 123 + 8 + 524 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381238523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16074 + ... + 31950.

It is an arithmetic number, because the mean of its divisors is an integer number (14448980).

Almost surely, 2^381238524 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 381238524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520163280).

381238524 is an abundant number, since it is smaller than the sum of its proper divisors (659088036).

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

381238524 is a wasteful number, since it uses less digits than its factorization.

381238524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15939 (or 15934 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 381238524 is about 19525.3303173083. The cubic root of 381238524 is about 725.1017052720.

The spelling of 381238524 in words is "three hundred eighty-one million, two hundred thirty-eight thousand, five hundred twenty-four".