381444492 has 72 divisors (see below), whose sum is σ = 1051444800. Its totient is φ = 106691520.

The previous prime is 381444473. The next prime is 381444509. The reversal of 381444492 is 294444183.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 381444492.

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, 13759 + ... + 30857.

It is an arithmetic number, because the mean of its divisors is an integer number (14603400).

Almost surely, 2^381444492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381444492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (525722400).

381444492 is an abundant number, since it is smaller than the sum of its proper divisors (670000308).

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

381444492 is a wasteful number, since it uses less digits than its factorization.

381444492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17143 (or 17128 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 381444492 is about 19530.6039845162. The cubic root of 381444492 is about 725.2322629598.

The spelling of 381444492 in words is "three hundred eighty-one million, four hundred forty-four thousand, four hundred ninety-two".