2789632840 has 32 divisors (see below), whose sum is σ = 6302739960. Its totient is φ = 1111219200.

The previous prime is 2789632823. The next prime is 2789632843. The reversal of 2789632840 is 482369872.

It can be written as a sum of positive squares in 4 ways, for example, as 2779609284 + 10023556 = 52722^2 + 3166^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2789632843) 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, 135051 + ... + 154330.

Almost surely, 2^2789632840 is an apocalyptic number.

2789632840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2789632840 is an abundant number, since it is smaller than the sum of its proper divisors (3513107120).

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

2789632840 is a wasteful number, since it uses less digits than its factorization.

2789632840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289633 (or 289629 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 2789632840 is about 52816.9749228409. The cubic root of 2789632840 is about 1407.7180599927.

The spelling of 2789632840 in words is "two billion, seven hundred eighty-nine million, six hundred thirty-two thousand, eight hundred forty".