2644493898 has 16 divisors (see below), whose sum is σ = 5289492096. Its totient is φ = 881413920.

The previous prime is 2644493897. The next prime is 2644493921. The reversal of 2644493898 is 8983944462.

It is not an unprimeable number, because it can be changed into a prime (2644493897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109918 + ... + 131798.

It is an arithmetic number, because the mean of its divisors is an integer number (330593256).

Almost surely, 2^2644493898 is an apocalyptic number.

2644493898 is an abundant number, since it is smaller than the sum of its proper divisors (2644998198).

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

2644493898 is a wasteful number, since it uses less digits than its factorization.

2644493898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42029.

The product of its digits is 11943936, while the sum is 57.

The square root of 2644493898 is about 51424.6429059065. The cubic root of 2644493898 is about 1382.8684119862.

The spelling of 2644493898 in words is "two billion, six hundred forty-four million, four hundred ninety-three thousand, eight hundred ninety-eight".