2278857549 has 32 divisors (see below), whose sum is σ = 3375129600. Its totient is φ = 1361162880.

The previous prime is 2278857509. The next prime is 2278857617. The reversal of 2278857549 is 9457588722.

It is not a de Polignac number, because 2278857549 - 2⁹ = 2278857037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278857509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106914 + ... + 126444.

It is an arithmetic number, because the mean of its divisors is an integer number (105472800).

Almost surely, 2^2278857549 is an apocalyptic number.

It is an amenable number.

2278857549 is a deficient number, since it is larger than the sum of its proper divisors (1096272051).

2278857549 is a wasteful number, since it uses less digits than its factorization.

2278857549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19665.

The product of its digits is 11289600, while the sum is 57.

The square root of 2278857549 is about 47737.3810446279. The cubic root of 2278857549 is about 1315.9490032144.

The spelling of 2278857549 in words is "two billion, two hundred seventy-eight million, eight hundred fifty-seven thousand, five hundred forty-nine".