1278213248 has 96 divisors (see below), whose sum is σ = 2833685460. Its totient is φ = 573640704.

The previous prime is 1278213241. The next prime is 1278213301. The reversal of 1278213248 is 8423128721.

It can be written as a sum of positive squares in 6 ways, for example, as 253701184 + 1024512064 = 15928^2 + 32008^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1278213241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 799586 + ... + 801182.

Almost surely, 2^1278213248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278213248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1416842730).

1278213248 is an abundant number, since it is smaller than the sum of its proper divisors (1555472212).

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

1278213248 is a wasteful number, since it uses less digits than its factorization.

1278213248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674 (or 1649 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 1278213248 is about 35752.1083014694. The cubic root of 1278213248 is about 1085.2616039757.

The spelling of 1278213248 in words is "one billion, two hundred seventy-eight million, two hundred thirteen thousand, two hundred forty-eight".