2772780387 has 16 divisors (see below), whose sum is σ = 4154535168. Its totient is φ = 1632137760.

The previous prime is 2772780331. The next prime is 2772780391. The reversal of 2772780387 is 7830872772.

It is not a de Polignac number, because 2772780387 - 2¹¹ = 2772778339 is a prime.

It is a super-2 number, since 2×2772780387² = 15376622149063739538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2772780397) 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, 1544689 + ... + 1546482.

It is an arithmetic number, because the mean of its divisors is an integer number (259658448).

Almost surely, 2^2772780387 is an apocalyptic number.

2772780387 is a deficient number, since it is larger than the sum of its proper divisors (1381754781).

2772780387 is a wasteful number, since it uses less digits than its factorization.

2772780387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091210.

The product of its (nonzero) digits is 1843968, while the sum is 51.

The square root of 2772780387 is about 52657.1969155214. The cubic root of 2772780387 is about 1404.8776102742.

The spelling of 2772780387 in words is "two billion, seven hundred seventy-two million, seven hundred eighty thousand, three hundred eighty-seven".