909428 has 12 divisors (see below), whose sum is σ = 1714020. Its totient is φ = 419712.

The previous prime is 909409. The next prime is 909437. The reversal of 909428 is 824909.

909428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40804 + 868624 = 202^2 + 932^2 .

It is a junction number, because it is equal to n+sod(n) for n = 909394 and 909403.

It is a congruent number.

It is an unprimeable number.

909428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8693 + ... + 8796.

It is an arithmetic number, because the mean of its divisors is an integer number (142835).

2⁹⁰⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

909428 is a deficient number, since it is larger than the sum of its proper divisors (804592).

909428 is a wasteful number, since it uses less digits than its factorization.

909428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17506 (or 17504 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 909428 is about 953.6393448259. The cubic root of 909428 is about 96.8849026298.

The spelling of 909428 in words is "nine hundred nine thousand, four hundred twenty-eight".