381049431840 has 768 divisors, whose sum is σ = 1698208727040. Its totient is φ = 77491261440.

The previous prime is 381049431811. The next prime is 381049431853. The reversal of 381049431840 is 48134940183.

381049431840 is a `hidden beast` number, since 3 + 81 + 0 + 494 + 3 + 1 + 84 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 15621894 + ... + 15646266.

It is an arithmetic number, because the mean of its divisors is an integer number (2211209280).

Almost surely, 2^381049431840 is an apocalyptic number.

381049431840 is a gapful number since it is divisible by the number (30) 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 381049431840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (849104363520).

381049431840 is an abundant number, since it is smaller than the sum of its proper divisors (1317159295200).

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

381049431840 is a wasteful number, since it uses less digits than its factorization.

381049431840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24462 (or 24448 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 381049431840 in words is "three hundred eighty-one billion, forty-nine million, four hundred thirty-one thousand, eight hundred forty".