381943800 has 144 divisors (see below), whose sum is σ = 1465985040. Its totient is φ = 87298560.

The previous prime is 381943799. The next prime is 381943817. The reversal of 381943800 is 8349183.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2557 + ... + 27756.

Almost surely, 2^381943800 is an apocalyptic number.

381943800 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 381943800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (732992520).

381943800 is an abundant number, since it is smaller than the sum of its proper divisors (1084041240).

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

381943800 is a wasteful number, since it uses less digits than its factorization.

381943800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30342 (or 30330 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 381943800 is about 19543.3825117353. The cubic root of 381943800 is about 725.5485661979.

The spelling of 381943800 in words is "three hundred eighty-one million, nine hundred forty-three thousand, eight hundred".