1706428 has 12 divisors (see below), whose sum is σ = 3143560. Its totient is φ = 808272.

The previous prime is 1706417. The next prime is 1706437. The reversal of 1706428 is 8246071.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1706396 and 1706405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11151 + ... + 11302.

2^1706428 is an apocalyptic number.

It is an amenable number.

1706428 is a deficient number, since it is larger than the sum of its proper divisors (1437132).

1706428 is a wasteful number, since it uses less digits than its factorization.

1706428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22476 (or 22474 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1706428 is about 1306.3031807356. The cubic root of 1706428 is about 119.4985556801.

The spelling of 1706428 in words is "one million, seven hundred six thousand, four hundred twenty-eight".