381707136 has 96 divisors (see below), whose sum is σ = 1107475200. Its totient is φ = 126185472.

The previous prime is 381707129. The next prime is 381707141. The reversal of 381707136 is 631707183.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a self number, because there is not a number n which added to its sum of digits gives 381707136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145000 + ... + 147608.

It is an arithmetic number, because the mean of its divisors is an integer number (11536200).

Almost surely, 2^381707136 is an apocalyptic number.

381707136 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381707136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (553737600).

381707136 is an abundant number, since it is smaller than the sum of its proper divisors (725768064).

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

381707136 is a wasteful number, since it uses less digits than its factorization.

381707136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756 (or 2741 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 381707136 is about 19537.3267362759. The cubic root of 381707136 is about 725.3986779125.

The spelling of 381707136 in words is "three hundred eighty-one million, seven hundred seven thousand, one hundred thirty-six".