1428520 has 32 divisors (see below), whose sum is σ = 3265920. Its totient is φ = 562240.

The previous prime is 1428491. The next prime is 1428521. The reversal of 1428520 is 258241.

It is a junction number, because it is equal to n+sod(n) for n = 1428491 and 1428500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2589 + ... + 3091.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2^1428520 is an apocalyptic number.

1428520 is a gapful number since it is divisible by the number (10) 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 1428520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632960).

1428520 is an abundant number, since it is smaller than the sum of its proper divisors (1837400).

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

1428520 is a wasteful number, since it uses less digits than its factorization.

1428520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1428520 is about 1195.2070950258. The cubic root of 1428520 is about 112.6234365307.

The spelling of 1428520 in words is "one million, four hundred twenty-eight thousand, five hundred twenty".