381438450 has 96 divisors (see below), whose sum is σ = 1087430400. Its totient is φ = 98199360.

The previous prime is 381438443. The next prime is 381438467. The reversal of 381438450 is 54834183.

It is a super-2 number, since 2×381438450² = 290990582276805000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34279 + ... + 44021.

It is an arithmetic number, because the mean of its divisors is an integer number (11327400).

Almost surely, 2^381438450 is an apocalyptic number.

381438450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 381438450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (543715200).

381438450 is an abundant number, since it is smaller than the sum of its proper divisors (705991950).

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

381438450 is a wasteful number, since it uses less digits than its factorization.

381438450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9793 (or 9782 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 381438450 is about 19530.4493035875. The cubic root of 381438450 is about 725.2284337644.

The spelling of 381438450 in words is "three hundred eighty-one million, four hundred thirty-eight thousand, four hundred fifty".