2640245442 has 8 divisors (see below), whose sum is σ = 5280490896. Its totient is φ = 880081812.

The previous prime is 2640245429. The next prime is 2640245449. The reversal of 2640245442 is 2445420462.

It is a sphenic number, since it is the product of 3 distinct primes.

2640245442 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2640245449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220020448 + ... + 220020459.

It is an arithmetic number, because the mean of its divisors is an integer number (660061362).

Almost surely, 2^2640245442 is an apocalyptic number.

2640245442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2640245442 is a wasteful number, since it uses less digits than its factorization.

2640245442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440040912.

The product of its (nonzero) digits is 61440, while the sum is 33.

The square root of 2640245442 is about 51383.3187133723. The cubic root of 2640245442 is about 1382.1274756876.

The spelling of 2640245442 in words is "two billion, six hundred forty million, two hundred forty-five thousand, four hundred forty-two".