381607890 has 32 divisors (see below), whose sum is σ = 919874880. Its totient is φ = 101315904.

The previous prime is 381607871. The next prime is 381607901. The reversal of 381607890 is 98706183.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20904 + ... + 34643.

It is an arithmetic number, because the mean of its divisors is an integer number (28746090).

Almost surely, 2^381607890 is an apocalyptic number.

381607890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381607890 is an abundant number, since it is smaller than the sum of its proper divisors (538266990).

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

381607890 is a wasteful number, since it uses less digits than its factorization.

381607890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55786.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 381607890 is about 19534.7866637954. The cubic root of 381607890 is about 725.3358032189.

The spelling of 381607890 in words is "three hundred eighty-one million, six hundred seven thousand, eight hundred ninety".