1280448 has 140 divisors (see below), whose sum is σ = 4302760. Its totient is φ = 373248.

The previous prime is 1280431. The next prime is 1280453. The reversal of 1280448 is 8440821.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 67383 + ... + 67401.

It is an arithmetic number, because the mean of its divisors is an integer number (30734).

2^1280448 is an apocalyptic number.

1280448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2151380).

1280448 is an abundant number, since it is smaller than the sum of its proper divisors (3022312).

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

1280448 is a wasteful number, since it uses less digits than its factorization.

1280448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 1280448 is about 1131.5688224761. The cubic root of 1280448 is about 108.5893704684.

It can be divided in two parts, 1280 and 448, that added together give a cube (1728 = 12³).

The spelling of 1280448 in words is "one million, two hundred eighty thousand, four hundred forty-eight".