1428280 has 32 divisors (see below), whose sum is σ = 3673440. Its totient is φ = 489600.

The previous prime is 1428257. The next prime is 1428281. The reversal of 1428280 is 828241.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2271 + ... + 2830.

It is an arithmetic number, because the mean of its divisors is an integer number (114795).

2^1428280 is an apocalyptic number.

1428280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428280 is an abundant number, since it is smaller than the sum of its proper divisors (2245160).

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

1428280 is a wasteful number, since it uses less digits than its factorization.

1428280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5119 (or 5115 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 1428280 is about 1195.1066897980. The cubic root of 1428280 is about 112.6171290379.

The spelling of 1428280 in words is "one million, four hundred twenty-eight thousand, two hundred eighty".