381949836 has 24 divisors (see below), whose sum is σ = 921948720. Its totient is φ = 122926272.

The previous prime is 381949817. The next prime is 381949847. The reversal of 381949836 is 638949183.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548431 + ... + 549126.

It is an arithmetic number, because the mean of its divisors is an integer number (38414530).

Almost surely, 2^381949836 is an apocalyptic number.

It is an amenable number.

381949836 is an abundant number, since it is smaller than the sum of its proper divisors (539998884).

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

381949836 is a wasteful number, since it uses less digits than its factorization.

381949836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097593 (or 1097591 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 381949836 is about 19543.5369367983. The cubic root of 381949836 is about 725.5523882158.

The spelling of 381949836 in words is "three hundred eighty-one million, nine hundred forty-nine thousand, eight hundred thirty-six".