381087343872 has 108 divisors (see below), whose sum is σ = 1100236830784. Its totient is φ = 126859392000.

The previous prime is 381087343853. The next prime is 381087343883. The reversal of 381087343872 is 278343780183.

It is a happy number.

381087343872 is a `hidden beast` number, since 38 + 108 + 7 + 3 + 438 + 72 = 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, 1620183 + ... + 1840425.

Almost surely, 2^381087343872 is an apocalyptic number.

381087343872 is a gapful number since it is divisible by the number (32) 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 381087343872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550118415392).

381087343872 is an abundant number, since it is smaller than the sum of its proper divisors (719149486912).

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

381087343872 is a wasteful number, since it uses less digits than its factorization.

381087343872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221016 (or 220999 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 381087343872 in words is "three hundred eighty-one billion, eighty-seven million, three hundred forty-three thousand, eight hundred seventy-two".