1278558248 has 32 divisors (see below), whose sum is σ = 2621216160. Its totient is φ = 579833280.

The previous prime is 1278558221. The next prime is 1278558251. The reversal of 1278558248 is 8428558721.

It is a super-2 number, since 2×1278558248² = 3269422387057659008, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1278558196 and 1278558205.

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, 22586 + ... + 55382.

It is an arithmetic number, because the mean of its divisors is an integer number (81913005).

Almost surely, 2^1278558248 is an apocalyptic number.

It is an amenable number.

1278558248 is an abundant number, since it is smaller than the sum of its proper divisors (1342657912).

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

1278558248 is a wasteful number, since it uses less digits than its factorization.

1278558248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33257 (or 33253 counting only the distinct ones).

The product of its digits is 1433600, while the sum is 50.

The square root of 1278558248 is about 35756.9328662289. The cubic root of 1278558248 is about 1085.3592354607.

The spelling of 1278558248 in words is "one billion, two hundred seventy-eight million, five hundred fifty-eight thousand, two hundred forty-eight".