2202639840 has 72 divisors (see below), whose sum is σ = 7516513368. Its totient is φ = 587370240.

The previous prime is 2202639839. The next prime is 2202639851. The reversal of 2202639840 is 489362022.

2202639840 is a `hidden beast` number, since 220 + 2 + 6 + 398 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2202639795 and 2202639804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 763366 + ... + 766245.

It is an arithmetic number, because the mean of its divisors is an integer number (104396019).

Almost surely, 2^2202639840 is an apocalyptic number.

2202639840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2202639840 is an abundant number, since it is smaller than the sum of its proper divisors (5313873528).

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

2202639840 is a wasteful number, since it uses less digits than its factorization.

2202639840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529632 (or 1529621 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 2202639840 is about 46932.2899505234. The cubic root of 2202639840 is about 1301.1114439698. Note that the first 3 decimals are identical.

The spelling of 2202639840 in words is "two billion, two hundred two million, six hundred thirty-nine thousand, eight hundred forty".