1868025988 has 6 divisors (see below), whose sum is σ = 3269045486. Its totient is φ = 934012992.

The previous prime is 1868025979. The next prime is 1868025989. The reversal of 1868025988 is 8895208681.

It can be written as a sum of positive squares in only one way, i.e., 1127750724 + 740275264 = 33582^2 + 27208^2 .

It is a super-2 number, since 2×1868025988² = 6979042183686752288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1868025989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 233503245 + ... + 233503252.

Almost surely, 2^1868025988 is an apocalyptic number.

It is an amenable number.

1868025988 is a deficient number, since it is larger than the sum of its proper divisors (1401019498).

1868025988 is a wasteful number, since it uses less digits than its factorization.

1868025988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467006501 (or 467006499 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 55.

The square root of 1868025988 is about 43220.6662142082. Note that the first 3 decimals coincide. The cubic root of 1868025988 is about 1231.5753028541.

The spelling of 1868025988 in words is "one billion, eight hundred sixty-eight million, twenty-five thousand, nine hundred eighty-eight".