1278249448 has 32 divisors (see below), whose sum is σ = 2900232000. Its totient is φ = 515596032.

The previous prime is 1278249437. The next prime is 1278249461. The reversal of 1278249448 is 8449428721.

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, 670398 + ... + 672301.

It is an arithmetic number, because the mean of its divisors is an integer number (90632250).

Almost surely, 2^1278249448 is an apocalyptic number.

It is an amenable number.

1278249448 is an abundant number, since it is smaller than the sum of its proper divisors (1621982552).

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

1278249448 is a wasteful number, since it uses less digits than its factorization.

1278249448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342729 (or 1342725 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 1278249448 is about 35752.6145617352. The cubic root of 1278249448 is about 1085.2718490318.

The spelling of 1278249448 in words is "one billion, two hundred seventy-eight million, two hundred forty-nine thousand, four hundred forty-eight".