381845040 has 40 divisors (see below), whose sum is σ = 1183720368. Its totient is φ = 101825280.

The previous prime is 381845039. The next prime is 381845053. The reversal of 381845040 is 40548183.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 381844992 and 381845010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795271 + ... + 795750.

Almost surely, 2^381845040 is an apocalyptic number.

381845040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

381845040 is an abundant number, since it is smaller than the sum of its proper divisors (801875328).

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

381845040 is a wasteful number, since it uses less digits than its factorization.

381845040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591037 (or 1591031 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 381845040 is about 19540.8556619202. The cubic root of 381845040 is about 725.4860252750.

The spelling of 381845040 in words is "three hundred eighty-one million, eight hundred forty-five thousand, forty".