1658428 has 6 divisors (see below), whose sum is σ = 2902256. Its totient is φ = 829212.

The previous prime is 1658417. The next prime is 1658429. The reversal of 1658428 is 8248561.

It is a junction number, because it is equal to n+sod(n) for n = 1658393 and 1658402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1658429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207300 + ... + 207307.

2^1658428 is an apocalyptic number.

It is an amenable number.

1658428 is a deficient number, since it is larger than the sum of its proper divisors (1243828).

1658428 is a wasteful number, since it uses less digits than its factorization.

1658428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414611 (or 414609 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 1658428 is about 1287.7996738624. The cubic root of 1658428 is about 118.3674269722.

The spelling of 1658428 in words is "one million, six hundred fifty-eight thousand, four hundred twenty-eight".