2189879544 has 16 divisors (see below), whose sum is σ = 5474698920. Its totient is φ = 729959840.

The previous prime is 2189879543. The next prime is 2189879551. The reversal of 2189879544 is 4459789812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189879543) 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, 45622467 + ... + 45622514.

Almost surely, 2^2189879544 is an apocalyptic number.

2189879544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2189879544 is an abundant number, since it is smaller than the sum of its proper divisors (3284819376).

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

2189879544 is a wasteful number, since it uses less digits than its factorization.

2189879544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91244990 (or 91244986 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 57.

The square root of 2189879544 is about 46796.1488159015. The cubic root of 2189879544 is about 1298.5940508237.

The spelling of 2189879544 in words is "two billion, one hundred eighty-nine million, eight hundred seventy-nine thousand, five hundred forty-four".