1868888444 has 48 divisors (see below), whose sum is σ = 3437930496. Its totient is φ = 887889600.

The previous prime is 1868888443. The next prime is 1868888459. The reversal of 1868888444 is 4448888681.

It is a super-2 number, since 2×1868888444² = 6985488032233482272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868888443) 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, 1672574 + ... + 1673690.

It is an arithmetic number, because the mean of its divisors is an integer number (71623552).

Almost surely, 2^1868888444 is an apocalyptic number.

It is an amenable number.

1868888444 is a deficient number, since it is larger than the sum of its proper divisors (1569042052).

1868888444 is a wasteful number, since it uses less digits than its factorization.

1868888444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386 (or 1384 counting only the distinct ones).

The product of its digits is 12582912, while the sum is 59.

The square root of 1868888444 is about 43230.6424194691. The cubic root of 1868888444 is about 1231.7648105824.

The spelling of 1868888444 in words is "one billion, eight hundred sixty-eight million, eight hundred eighty-eight thousand, four hundred forty-four".