2642189808 has 20 divisors (see below), whose sum is σ = 6825657128. Its totient is φ = 880729920.

The previous prime is 2642189789. The next prime is 2642189833. The reversal of 2642189808 is 8089812462.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 55045621 = 2642189808 / (2 + 6 + 4 + 2 + 1 + 8 + 9 + 8 + 0 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27522763 + ... + 27522858.

Almost surely, 2^2642189808 is an apocalyptic number.

It is an amenable number.

2642189808 is an abundant number, since it is smaller than the sum of its proper divisors (4183467320).

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

2642189808 is a wasteful number, since it uses less digits than its factorization.

2642189808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55045632 (or 55045626 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The square root of 2642189808 is about 51402.2354377706. The cubic root of 2642189808 is about 1382.4666742346.

The spelling of 2642189808 in words is "two billion, six hundred forty-two million, one hundred eighty-nine thousand, eight hundred eight".