2086400988 has 54 divisors (see below), whose sum is σ = 6135017616. Its totient is φ = 596114064.

The previous prime is 2086400917. The next prime is 2086400993. The reversal of 2086400988 is 8890046802.

It is a happy number.

It is a super-2 number, since 2×2086400988² = 8706138165454752288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 589620 + ... + 593147.

Almost surely, 2^2086400988 is an apocalyptic number.

2086400988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2086400988 is an abundant number, since it is smaller than the sum of its proper divisors (4048616628).

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

2086400988 is a wasteful number, since it uses less digits than its factorization.

2086400988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182791 (or 1182779 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 2086400988 is about 45677.1385706241. The cubic root of 2086400988 is about 1277.8089526111.

The spelling of 2086400988 in words is "two billion, eighty-six million, four hundred thousand, nine hundred eighty-eight".