1428736 has 18 divisors (see below), whose sum is σ = 2852402. Its totient is φ = 714240.

The previous prime is 1428709. The next prime is 1428751. The reversal of 1428736 is 6378241.

It can be written as a sum of positive squares in only one way, i.e., 1115136 + 313600 = 1056^2 + 560^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1428698 and 1428707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2535 + ... + 3046.

2^1428736 is an apocalyptic number.

1428736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1428736 is a deficient number, since it is larger than the sum of its proper divisors (1423666).

1428736 is an frugal number, since it uses more digits than its factorization.

1428736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5597 (or 5583 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 1428736 is about 1195.2974525197. The cubic root of 1428736 is about 112.6291126702.

The spelling of 1428736 in words is "one million, four hundred twenty-eight thousand, seven hundred thirty-six".