1278845436 has 48 divisors (see below), whose sum is σ = 3287507328. Its totient is φ = 383688000.

The previous prime is 1278845401. The next prime is 1278845437. The reversal of 1278845436 is 6345488721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278845437) 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, 34630 + ... + 61293.

It is an arithmetic number, because the mean of its divisors is an integer number (68489736).

Almost surely, 2^1278845436 is an apocalyptic number.

It is an amenable number.

1278845436 is an abundant number, since it is smaller than the sum of its proper divisors (2008661892).

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

1278845436 is a wasteful number, since it uses less digits than its factorization.

1278845436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96042 (or 96040 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The square root of 1278845436 is about 35760.9484773545. The cubic root of 1278845436 is about 1085.4404933445.

The spelling of 1278845436 in words is "one billion, two hundred seventy-eight million, eight hundred forty-five thousand, four hundred thirty-six".