2208860640 has 144 divisors (see below), whose sum is σ = 8614595808. Its totient is φ = 504880128.

The previous prime is 2208860629. The next prime is 2208860653. The reversal of 2208860640 is 460688022.

2208860640 is a `hidden beast` number, since 2 + 2 + 0 + 8 + 8 + 6 + 0 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 = 2208860595 and 2208860604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99487 + ... + 119646.

It is an arithmetic number, because the mean of its divisors is an integer number (59823582).

Almost surely, 2^2208860640 is an apocalyptic number.

2208860640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2208860640 is an abundant number, since it is smaller than the sum of its proper divisors (6405735168).

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

2208860640 is a wasteful number, since it uses less digits than its factorization.

2208860640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219161 (or 219150 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 2208860640 is about 46998.5174234252. The cubic root of 2208860640 is about 1302.3351795500.

It can be divided in two parts, 22088 and 60640, that added together give a palindrome (82728).

The spelling of 2208860640 in words is "two billion, two hundred eight million, eight hundred sixty thousand, six hundred forty".