2109774840 has 64 divisors (see below), whose sum is σ = 6339772800. Its totient is φ = 561677952.

The previous prime is 2109774827. The next prime is 2109774857. The reversal of 2109774840 is 484779012.

It is a happy number.

It is a super-2 number, since 2×2109774840² = 8902299750994051200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2109774792 and 2109774801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60079 + ... + 88481.

It is an arithmetic number, because the mean of its divisors is an integer number (99058950).

Almost surely, 2^2109774840 is an apocalyptic number.

2109774840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2109774840 is an abundant number, since it is smaller than the sum of its proper divisors (4229997960).

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

2109774840 is a wasteful number, since it uses less digits than its factorization.

2109774840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29036 (or 29032 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 2109774840 is about 45932.2853774989. The cubic root of 2109774840 is about 1282.5629879882.

The spelling of 2109774840 in words is "two billion, one hundred nine million, seven hundred seventy-four thousand, eight hundred forty".