381809850 has 48 divisors (see below), whose sum is σ = 948972000. Its totient is φ = 101592000.

The previous prime is 381809819. The next prime is 381809861. The reversal of 381809850 is 58908183.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72300 + ... + 77400.

It is an arithmetic number, because the mean of its divisors is an integer number (19770250).

Almost surely, 2^381809850 is an apocalyptic number.

381809850 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381809850 is an abundant number, since it is smaller than the sum of its proper divisors (567162150).

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

381809850 is a wasteful number, since it uses less digits than its factorization.

381809850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5615 (or 5610 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 381809850 is about 19539.9552200101. The cubic root of 381809850 is about 725.4637381909.

The spelling of 381809850 in words is "three hundred eighty-one million, eight hundred nine thousand, eight hundred fifty".