1428724 has 24 divisors (see below), whose sum is σ = 2872800. Its totient is φ = 614880.

The previous prime is 1428709. The next prime is 1428751. The reversal of 1428724 is 4278241.

1428724 = T₂₅₅ + T₂₅₆ + ... + T₂₉₂.

It is a junction number, because it is equal to n+sod(n) for n = 1428692 and 1428701.

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, 19 + ... + 1690.

It is an arithmetic number, because the mean of its divisors is an integer number (119700).

2^1428724 is an apocalyptic number.

It is an amenable number.

1428724 is an abundant number, since it is smaller than the sum of its proper divisors (1444076).

1428724 is a wasteful number, since it uses less digits than its factorization.

1428724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743 (or 1741 counting only the distinct ones).

The product of its digits is 3584, while the sum is 28.

The square root of 1428724 is about 1195.2924328381. The cubic root of 1428724 is about 112.6287973441.

The spelling of 1428724 in words is "one million, four hundred twenty-eight thousand, seven hundred twenty-four".