381257180 has 48 divisors (see below), whose sum is σ = 814502304. Its totient is φ = 149882880.

The previous prime is 381257057. The next prime is 381257183. The reversal of 381257180 is 81752183.

It is a self number, because there is not a number n which added to its sum of digits gives 381257180.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381257183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399584 + ... + 400536.

It is an arithmetic number, because the mean of its divisors is an integer number (16968798).

Almost surely, 2^381257180 is an apocalyptic number.

It is an amenable number.

381257180 is an abundant number, since it is smaller than the sum of its proper divisors (433245124).

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

381257180 is a wasteful number, since it uses less digits than its factorization.

381257180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 381257180 is about 19525.8080498606. The cubic root of 381257180 is about 725.1135327553.

The spelling of 381257180 in words is "three hundred eighty-one million, two hundred fifty-seven thousand, one hundred eighty".