1868140287 has 64 divisors (see below), whose sum is σ = 3149977600. Its totient is φ = 1084752000.

The previous prime is 1868140283. The next prime is 1868140301. The reversal of 1868140287 is 7820418681.

It is not a de Polignac number, because 1868140287 - 2² = 1868140283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868140283) 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, 2487162 + ... + 2487912.

It is an arithmetic number, because the mean of its divisors is an integer number (49218400).

Almost surely, 2^1868140287 is an apocalyptic number.

1868140287 is a deficient number, since it is larger than the sum of its proper divisors (1281837313).

1868140287 is a wasteful number, since it uses less digits than its factorization.

1868140287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 1868140287 is about 43221.9884665201. The cubic root of 1868140287 is about 1231.6004211618.

The spelling of 1868140287 in words is "one billion, eight hundred sixty-eight million, one hundred forty thousand, two hundred eighty-seven".