1305278448 has 80 divisors (see below), whose sum is σ = 3447636480. Its totient is φ = 425438208.

The previous prime is 1305278399. The next prime is 1305278477. The reversal of 1305278448 is 8448725031.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404136 + ... + 407352.

It is an arithmetic number, because the mean of its divisors is an integer number (43095456).

Almost surely, 2^1305278448 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 1305278448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1723818240).

1305278448 is an abundant number, since it is smaller than the sum of its proper divisors (2142358032).

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

1305278448 is a wasteful number, since it uses less digits than its factorization.

1305278448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3414 (or 3408 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 1305278448 is about 36128.6375054471. The cubic root of 1305278448 is about 1092.8680320598.

The spelling of 1305278448 in words is "one billion, three hundred five million, two hundred seventy-eight thousand, four hundred forty-eight".