2778315670 has 32 divisors (see below), whose sum is σ = 5446193760. Its totient is φ = 1014309120.

The previous prime is 2778315667. The next prime is 2778315671. The reversal of 2778315670 is 765138772.

It is a self number, because there is not a number n which added to its sum of digits gives 2778315670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778315671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108496 + ... + 131635.

It is an arithmetic number, because the mean of its divisors is an integer number (170193555).

Almost surely, 2^2778315670 is an apocalyptic number.

2778315670 is a deficient number, since it is larger than the sum of its proper divisors (2667878090).

2778315670 is a wasteful number, since it uses less digits than its factorization.

2778315670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240240.

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 2778315670 is about 52709.7303161380. The cubic root of 2778315670 is about 1405.8118381543.

The spelling of 2778315670 in words is "two billion, seven hundred seventy-eight million, three hundred fifteen thousand, six hundred seventy".