2217869840 has 40 divisors (see below), whose sum is σ = 5266270080. Its totient is φ = 868270976.

The previous prime is 2217869833. The next prime is 2217869893. The reversal of 2217869840 is 489687122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (47).

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 7 ways as a sum of consecutive naturals, for example, 291170 + ... + 298689.

It is an arithmetic number, because the mean of its divisors is an integer number (131656752).

Almost surely, 2^2217869840 is an apocalyptic number.

2217869840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2217869840 is an abundant number, since it is smaller than the sum of its proper divisors (3048400240).

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

2217869840 is a wasteful number, since it uses less digits than its factorization.

2217869840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589919 (or 589913 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 2217869840 is about 47094.2654683137. The cubic root of 2217869840 is about 1304.1033735656.

The spelling of 2217869840 in words is "two billion, two hundred seventeen million, eight hundred sixty-nine thousand, eight hundred forty".