1999025868 has 48 divisors (see below), whose sum is σ = 5403776000. Its totient is φ = 563324544.

The previous prime is 1999025863. The next prime is 1999025881. The reversal of 1999025868 is 8685209991.

It is a super-2 number, since 2×1999025868² = 7992208841866306848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1999025863) 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, 156868 + ... + 169131.

Almost surely, 2^1999025868 is an apocalyptic number.

It is an amenable number.

1999025868 is an abundant number, since it is smaller than the sum of its proper divisors (3404750132).

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

1999025868 is a wasteful number, since it uses less digits than its factorization.

1999025868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326086 (or 326084 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 57.

The square root of 1999025868 is about 44710.4670966430. The cubic root of 1999025868 is about 1259.7164617733.

The spelling of 1999025868 in words is "one billion, nine hundred ninety-nine million, twenty-five thousand, eight hundred sixty-eight".