2149089840 has 80 divisors (see below), whose sum is σ = 7402428000. Its totient is φ = 573090048.

The previous prime is 2149089827. The next prime is 2149089857. The reversal of 2149089840 is 489809412.

2149089840 is a `hidden beast` number, since 2 + 1 + 490 + 89 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495315 + ... + 499634.

It is an arithmetic number, because the mean of its divisors is an integer number (92530350).

Almost surely, 2^2149089840 is an apocalyptic number.

2149089840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2149089840 is an abundant number, since it is smaller than the sum of its proper divisors (5253338160).

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

2149089840 is a wasteful number, since it uses less digits than its factorization.

2149089840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994971 (or 994959 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 2149089840 is about 46358.2769308783. The cubic root of 2149089840 is about 1290.4807294291.

The spelling of 2149089840 in words is "two billion, one hundred forty-nine million, eighty-nine thousand, eight hundred forty".