381687285 has 32 divisors (see below), whose sum is σ = 698971392. Its totient is φ = 174228480.

The previous prime is 381687263. The next prime is 381687311. The reversal of 381687285 is 582786183.

It is not a de Polignac number, because 381687285 - 2¹⁷ = 381556213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81405 + ... + 85965.

It is an arithmetic number, because the mean of its divisors is an integer number (21842856).

Almost surely, 2^381687285 is an apocalyptic number.

381687285 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

381687285 is a deficient number, since it is larger than the sum of its proper divisors (317284107).

381687285 is a wasteful number, since it uses less digits than its factorization.

381687285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5373.

The product of its digits is 645120, while the sum is 48.

The square root of 381687285 is about 19536.8187021326. The cubic root of 381687285 is about 725.3861027055.

The spelling of 381687285 in words is "three hundred eighty-one million, six hundred eighty-seven thousand, two hundred eighty-five".