1428980 has 48 divisors (see below), whose sum is σ = 3507840. Its totient is φ = 478848.

The previous prime is 1428979. The next prime is 1428991. The reversal of 1428980 is 898241.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8174 + ... + 8346.

It is an arithmetic number, because the mean of its divisors is an integer number (73080).

2^1428980 is an apocalyptic number.

1428980 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 1428980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1753920).

1428980 is an abundant number, since it is smaller than the sum of its proper divisors (2078860).

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

1428980 is a wasteful number, since it uses less digits than its factorization.

1428980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1428980 is about 1195.3995148067. The cubic root of 1428980 is about 112.6355239174.

The spelling of 1428980 in words is "one million, four hundred twenty-eight thousand, nine hundred eighty".