381097808 has 80 divisors (see below), whose sum is σ = 928273920. Its totient is φ = 147529728.

The previous prime is 381097793. The next prime is 381097813. The reversal of 381097808 is 808790183.

It is a congruent 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, 65648 + ... + 71216.

It is an arithmetic number, because the mean of its divisors is an integer number (11603424).

Almost surely, 2^381097808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381097808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464136960).

381097808 is an abundant number, since it is smaller than the sum of its proper divisors (547176112).

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

381097808 is a wasteful number, since it uses less digits than its factorization.

381097808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644 (or 5638 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 381097808 is about 19521.7265629862. The cubic root of 381097808 is about 725.0124820681.

The spelling of 381097808 in words is "three hundred eighty-one million, ninety-seven thousand, eight hundred eight".