2778477258 has 16 divisors (see below), whose sum is σ = 5692490496. Its totient is φ = 903569760.

The previous prime is 2778477241. The next prime is 2778477259. The reversal of 2778477258 is 8527748772.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2778477198 and 2778477207.

It is not an unprimeable number, because it can be changed into a prime (2778477259) 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, 5647066 + ... + 5647557.

It is an arithmetic number, because the mean of its divisors is an integer number (355780656).

Almost surely, 2^2778477258 is an apocalyptic number.

2778477258 is an abundant number, since it is smaller than the sum of its proper divisors (2914013238).

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

2778477258 is a wasteful number, since it uses less digits than its factorization.

2778477258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11294669.

The product of its digits is 12293120, while the sum is 57.

The square root of 2778477258 is about 52711.2631038187. The cubic root of 2778477258 is about 1405.8390918272.

The spelling of 2778477258 in words is "two billion, seven hundred seventy-eight million, four hundred seventy-seven thousand, two hundred fifty-eight".