381357280 has 24 divisors (see below), whose sum is σ = 900956952. Its totient is φ = 152542848.

The previous prime is 381357271. The next prime is 381357283. The reversal of 381357280 is 82753183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381357283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191582 + ... + 1191901.

It is an arithmetic number, because the mean of its divisors is an integer number (37539873).

Almost surely, 2^381357280 is an apocalyptic number.

It is an amenable number.

381357280 is an abundant number, since it is smaller than the sum of its proper divisors (519599672).

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

381357280 is a wasteful number, since it uses less digits than its factorization.

381357280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383498 (or 2383490 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 381357280 is about 19528.3711558338. The cubic root of 381357280 is about 725.1769873095.

The spelling of 381357280 in words is "three hundred eighty-one million, three hundred fifty-seven thousand, two hundred eighty".