381105720 has 48 divisors (see below), whose sum is σ = 1238594760. Its totient is φ = 101628096.

The previous prime is 381105719. The next prime is 381105731. The reversal of 381105720 is 27501183.

381105720 is a `hidden beast` number, since 3 + 81 + 10 + 572 + 0 = 666.

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, 528954 + ... + 529673.

Almost surely, 2^381105720 is an apocalyptic number.

381105720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

381105720 is an abundant number, since it is smaller than the sum of its proper divisors (857489040).

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

381105720 is a wasteful number, since it uses less digits than its factorization.

381105720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058644 (or 1058637 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 381105720 is about 19521.9292079446. The cubic root of 381105720 is about 725.0174993794.

The spelling of 381105720 in words is "three hundred eighty-one million, one hundred five thousand, seven hundred twenty".