381814587 has 64 divisors (see below), whose sum is σ = 721797120. Its totient is φ = 193687200.

The previous prime is 381814553. The next prime is 381814603. The reversal of 381814587 is 785418183.

It is a happy number.

It is not a de Polignac number, because 381814587 - 2¹⁴ = 381798203 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (381814387) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 87262 + ... + 91532.

It is an arithmetic number, because the mean of its divisors is an integer number (11278080).

Almost surely, 2^381814587 is an apocalyptic number.

381814587 is a deficient number, since it is larger than the sum of its proper divisors (339982533).

381814587 is a wasteful number, since it uses less digits than its factorization.

381814587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341 (or 4335 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 381814587 is about 19540.0764328085. The cubic root of 381814587 is about 725.4667383820.

The spelling of 381814587 in words is "three hundred eighty-one million, eight hundred fourteen thousand, five hundred eighty-seven".