2798887645 has 4 divisors (see below), whose sum is σ = 3358665180. Its totient is φ = 2239110112.

The previous prime is 2798887639. The next prime is 2798887649. The reversal of 2798887645 is 5467888972.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1366189444 + 1432698201 = 36962^2 + 37851^2 .

It is a cyclic number.

It is not a de Polignac number, because 2798887645 - 2⁷ = 2798887517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2798887649) 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, 279888760 + ... + 279888769.

It is an arithmetic number, because the mean of its divisors is an integer number (839666295).

Almost surely, 2^2798887645 is an apocalyptic number.

It is an amenable number.

2798887645 is a deficient number, since it is larger than the sum of its proper divisors (559777535).

2798887645 is an equidigital number, since it uses as much as digits as its factorization.

2798887645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559777534.

The product of its digits is 54190080, while the sum is 64.

The square root of 2798887645 is about 52904.5144103979. The cubic root of 2798887645 is about 1409.2730765013.

The spelling of 2798887645 in words is "two billion, seven hundred ninety-eight million, eight hundred eighty-seven thousand, six hundred forty-five".