1428340 has 24 divisors (see below), whose sum is σ = 3176712. Its totient is φ = 537600.

The previous prime is 1428281. The next prime is 1428359. The reversal of 1428340 is 438241.

It can be written as a sum of positive squares in 4 ways, for example, as 54756 + 1373584 = 234^2 + 1172^2 .

It is a hoax number, since the sum of its digits (22) 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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1761 + ... + 2440.

It is an arithmetic number, because the mean of its divisors is an integer number (132363).

2^1428340 is an apocalyptic number.

1428340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428340 is an abundant number, since it is smaller than the sum of its proper divisors (1748372).

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

1428340 is a wasteful number, since it uses less digits than its factorization.

1428340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227 (or 4225 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1428340 is about 1195.1317918958. The cubic root of 1428340 is about 112.6187059774.

Subtracting from 1428340 its reverse (438241), we obtain a palindrome (990099).

The spelling of 1428340 in words is "one million, four hundred twenty-eight thousand, three hundred forty".