381399948 has 24 divisors (see below), whose sum is σ = 988814960. Its totient is φ = 127133280.

The previous prime is 381399911. The next prime is 381399983. The reversal of 381399948 is 849993183.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 381399894 and 381399903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1765633 + ... + 1765848.

Almost surely, 2^381399948 is an apocalyptic number.

It is an amenable number.

381399948 is an abundant number, since it is smaller than the sum of its proper divisors (607415012).

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

381399948 is a wasteful number, since it uses less digits than its factorization.

381399948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3531494 (or 3531486 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 381399948 is about 19529.4635871035. The cubic root of 381399948 is about 725.2040316757.

The spelling of 381399948 in words is "three hundred eighty-one million, three hundred ninety-nine thousand, nine hundred forty-eight".