1428730 has 8 divisors (see below), whose sum is σ = 2571732. Its totient is φ = 571488.

The previous prime is 1428709. The next prime is 1428751. The reversal of 1428730 is 378241.

It is an interprime number because it is at equal distance from previous prime (1428709) and next prime (1428751).

It can be written as a sum of positive squares in 2 ways, for example, as 1399489 + 29241 = 1183^2 + 171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1428695 and 1428704.

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 3 ways as a sum of consecutive naturals, for example, 71427 + ... + 71446.

2^1428730 is an apocalyptic number.

1428730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1428730 is a deficient number, since it is larger than the sum of its proper divisors (1143002).

1428730 is a wasteful number, since it uses less digits than its factorization.

1428730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142880.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1428730 is about 1195.2949426815. The cubic root of 1428730 is about 112.6289550073.

The spelling of 1428730 in words is "one million, four hundred twenty-eight thousand, seven hundred thirty".