2218796640 has 72 divisors (see below), whose sum is σ = 7571648448. Its totient is φ = 591678720.

The previous prime is 2218796627. The next prime is 2218796651. The reversal of 2218796640 is 466978122.

It is a happy number.

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 (45).

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, 768976 + ... + 771855.

It is an arithmetic number, because the mean of its divisors is an integer number (105161784).

Almost surely, 2^2218796640 is an apocalyptic number.

2218796640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2218796640 is an abundant number, since it is smaller than the sum of its proper divisors (5352851808).

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

2218796640 is a wasteful number, since it uses less digits than its factorization.

2218796640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540852 (or 1540841 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 2218796640 is about 47104.1042797759. The cubic root of 2218796640 is about 1304.2850004986.

The spelling of 2218796640 in words is "two billion, two hundred eighteen million, seven hundred ninety-six thousand, six hundred forty".