1928428 has 12 divisors (see below), whose sum is σ = 3406480. Its totient is φ = 955152.

The previous prime is 1928419. The next prime is 1928447. The reversal of 1928428 is 8248291.

It is a junction number, because it is equal to n+sod(n) for n = 1928393 and 1928402.

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, 1776 + ... + 2647.

2^1928428 is an apocalyptic number.

It is an amenable number.

1928428 is a deficient number, since it is larger than the sum of its proper divisors (1478052).

1928428 is a wasteful number, since it uses less digits than its factorization.

1928428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536 (or 4534 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 1928428 is about 1388.6785085109. The cubic root of 1928428 is about 124.4708942031.

The spelling of 1928428 in words is "one million, nine hundred twenty-eight thousand, four hundred twenty-eight".