1779428 has 24 divisors (see below), whose sum is σ = 3599232. Its totient is φ = 753984.

The previous prime is 1779409. The next prime is 1779443. The reversal of 1779428 is 8249771.

It is a junction number, because it is equal to n+sod(n) for n = 1779391 and 1779400.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2576 + ... + 3192.

It is an arithmetic number, because the mean of its divisors is an integer number (149968).

2^1779428 is an apocalyptic number.

It is an amenable number.

1779428 is an abundant number, since it is smaller than the sum of its proper divisors (1819804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1779428 is a wasteful number, since it uses less digits than its factorization.

1779428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 729 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 1779428 is about 1333.9520231253. The cubic root of 1779428 is about 121.1788444233.

The spelling of 1779428 in words is "one million, seven hundred seventy-nine thousand, four hundred twenty-eight".