911428 has 24 divisors (see below), whose sum is σ = 1867712. Its totient is φ = 381024.

The previous prime is 911419. The next prime is 911437. The reversal of 911428 is 824119.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (911419) and next prime (911437).

It is a congruent number.

It is an unprimeable number.

911428 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 7 ways as a sum of consecutive naturals, for example, 826 + ... + 1582.

2⁹¹¹⁴²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 911428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933856).

911428 is an abundant number, since it is smaller than the sum of its proper divisors (956284).

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

911428 is a wasteful number, since it uses less digits than its factorization.

911428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 809 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 911428 is about 954.6873833879. The cubic root of 911428 is about 96.9558732228.

The spelling of 911428 in words is "nine hundred eleven thousand, four hundred twenty-eight".