2240728644 has 72 divisors (see below), whose sum is σ = 6634903968. Its totient is φ = 582005760.

The previous prime is 2240728549. The next prime is 2240728661. The reversal of 2240728644 is 4468270422.

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, 166749 + ... + 179684.

It is an arithmetic number, because the mean of its divisors is an integer number (92151444).

Almost surely, 2^2240728644 is an apocalyptic number.

It is an amenable number.

2240728644 is an abundant number, since it is smaller than the sum of its proper divisors (4394175324).

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

2240728644 is a wasteful number, since it uses less digits than its factorization.

2240728644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346465 (or 346456 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 39.

The square root of 2240728644 is about 47336.3353461165. The cubic root of 2240728644 is about 1308.5683802928.

The spelling of 2240728644 in words is "two billion, two hundred forty million, seven hundred twenty-eight thousand, six hundred forty-four".