1428500 has 24 divisors (see below), whose sum is σ = 3120936. Its totient is φ = 571200.

The previous prime is 1428491. The next prime is 1428521. The reversal of 1428500 is 58241.

It can be written as a sum of positive squares in 4 ways, for example, as 21904 + 1406596 = 148^2 + 1186^2 .

It is a super-2 number, since 2×1428500² = 4081224500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 929 + ... + 1928.

It is an arithmetic number, because the mean of its divisors is an integer number (130039).

2^1428500 is an apocalyptic number.

1428500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428500 is an abundant number, since it is smaller than the sum of its proper divisors (1692436).

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

1428500 is a wasteful number, since it uses less digits than its factorization.

1428500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876 (or 2864 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1428500 is about 1195.1987282456. The cubic root of 1428500 is about 112.6229109333.

The spelling of 1428500 in words is "one million, four hundred twenty-eight thousand, five hundred".