1868231994 has 64 divisors (see below), whose sum is σ = 4060240128. Its totient is φ = 571507200.

The previous prime is 1868231951. The next prime is 1868232011. The reversal of 1868231994 is 4991328681.

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, 342432 + ... + 347844.

It is an arithmetic number, because the mean of its divisors is an integer number (63441252).

Almost surely, 2^1868231994 is an apocalyptic number.

1868231994 is an abundant number, since it is smaller than the sum of its proper divisors (2192008134).

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

1868231994 is a wasteful number, since it uses less digits than its factorization.

1868231994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5543.

The product of its digits is 746496, while the sum is 51.

The square root of 1868231994 is about 43223.0493371303. The cubic root of 1868231994 is about 1231.6205739188.

The spelling of 1868231994 in words is "one billion, eight hundred sixty-eight million, two hundred thirty-one thousand, nine hundred ninety-four".