2278439289 has 27 divisors (see below), whose sum is σ = 3830083023. Its totient is φ = 1301392512.

The previous prime is 2278439153. The next prime is 2278439299. The reversal of 2278439289 is 9829348722.

It is a happy number.

The square root of 2278439289 is 47733.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2029052025 + 249387264 = 45045^2 + 15792^2 .

It is not a de Polignac number, because 2278439289 - 2¹¹ = 2278437241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2278439299) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1001257 + ... + 1003529.

Almost surely, 2^2278439289 is an apocalyptic number.

2278439289 is the 47733-rd square number.

2278439289 is the 23867-th centered octagonal number.

It is an amenable number.

2278439289 is a deficient number, since it is larger than the sum of its proper divisors (1551643734).

2278439289 is an frugal number, since it uses more digits than its factorization.

2278439289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566 (or 2283 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The cubic root of 2278439289 is about 1315.8684888199.

The spelling of 2278439289 in words is "two billion, two hundred seventy-eight million, four hundred thirty-nine thousand, two hundred eighty-nine".