2787878015 has 8 divisors (see below), whose sum is σ = 3602796288. Its totient is φ = 2058740640.

The previous prime is 2787877993. The next prime is 2787878017. The reversal of 2787878015 is 5108787872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2787878015 - 2⁸ = 2787877759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2787878017) 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, 21445151 + ... + 21445280.

It is an arithmetic number, because the mean of its divisors is an integer number (450349536).

Almost surely, 2^2787878015 is an apocalyptic number.

2787878015 is a deficient number, since it is larger than the sum of its proper divisors (814918273).

2787878015 is a wasteful number, since it uses less digits than its factorization.

2787878015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42890449.

The product of its (nonzero) digits is 1756160, while the sum is 53.

The square root of 2787878015 is about 52800.3599893031. The cubic root of 2787878015 is about 1407.4228219751.

The spelling of 2787878015 in words is "two billion, seven hundred eighty-seven million, eight hundred seventy-eight thousand, fifteen".