381183894 has 224 divisors, whose sum is σ = 1123778880. Its totient is φ = 94618368.

The previous prime is 381183883. The next prime is 381183923. The reversal of 381183894 is 498381183.

381183894 is a `hidden beast` number, since 381 + 183 + 8 + 94 = 666.

It is a super-2 number, since 2×381183894² = 290602322090006472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 22422574 + ... + 22422590.

It is an arithmetic number, because the mean of its divisors is an integer number (5016870).

Almost surely, 2^381183894 is an apocalyptic number.

381183894 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 381183894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (561889440).

381183894 is an abundant number, since it is smaller than the sum of its proper divisors (742594986).

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

381183894 is an equidigital number, since it uses as much as digits as its factorization.

381183894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 42 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 381183894 is about 19523.9313151834. The cubic root of 381183894 is about 725.0670688647.

The spelling of 381183894 in words is "three hundred eighty-one million, one hundred eighty-three thousand, eight hundred ninety-four".