2780031028 has 24 divisors (see below), whose sum is σ = 4907879424. Its totient is φ = 1377823200.

The previous prime is 2780031013. The next prime is 2780031043. The reversal of 2780031028 is 8201300872.

2780031028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2780031013) and next prime (2780031043).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265533 + ... + 275803.

It is an arithmetic number, because the mean of its divisors is an integer number (204494976).

Almost surely, 2^2780031028 is an apocalyptic number.

It is an amenable number.

2780031028 is a deficient number, since it is larger than the sum of its proper divisors (2127848396).

2780031028 is a wasteful number, since it uses less digits than its factorization.

2780031028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10863 (or 10861 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 2780031028 is about 52725.9995448166. Note that the first 3 decimals coincide. The cubic root of 2780031028 is about 1406.1010990773.

The spelling of 2780031028 in words is "two billion, seven hundred eighty million, thirty-one thousand, twenty-eight".