2789245840 has 40 divisors (see below), whose sum is σ = 6607365048. Its totient is φ = 1094645760.

The previous prime is 2789245819. The next prime is 2789245861. The reversal of 2789245840 is 485429872.

It is an interprime number because it is at equal distance from previous prime (2789245819) and next prime (2789245861).

It can be written as a sum of positive squares in 4 ways, for example, as 823919616 + 1965326224 = 28704^2 + 44332^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-5 number, since 5×2789245840⁵ (a number of 48 digits) contains 55555 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324681 + ... + 333160.

Almost surely, 2^2789245840 is an apocalyptic number.

2789245840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2789245840 is an abundant number, since it is smaller than the sum of its proper divisors (3818119208).

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

2789245840 is a wasteful number, since it uses less digits than its factorization.

2789245840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657907 (or 657901 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The square root of 2789245840 is about 52813.3112008706. The cubic root of 2789245840 is about 1407.6529603762.

The spelling of 2789245840 in words is "two billion, seven hundred eighty-nine million, two hundred forty-five thousand, eight hundred forty".