2189040540 has 48 divisors (see below), whose sum is σ = 6451912320. Its totient is φ = 553020480.

The previous prime is 2189040533. The next prime is 2189040577. The reversal of 2189040540 is 450409812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 958966 + ... + 961245.

It is an arithmetic number, because the mean of its divisors is an integer number (134414840).

Almost surely, 2^2189040540 is an apocalyptic number.

2189040540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2189040540 is an abundant number, since it is smaller than the sum of its proper divisors (4262871780).

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

2189040540 is a wasteful number, since it uses less digits than its factorization.

2189040540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920242 (or 1920240 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 2189040540 is about 46787.1835014676. The cubic root of 2189040540 is about 1298.4281870926.

The spelling of 2189040540 in words is "two billion, one hundred eighty-nine million, forty thousand, five hundred forty".