994428 has 36 divisors (see below), whose sum is σ = 2625168. Its totient is φ = 316800.

The previous prime is 994417. The next prime is 994447. The reversal of 994428 is 824499.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 994392 and 994401.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 994428.

It is an unprimeable number.

994428 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 11 ways as a sum of consecutive naturals, for example, 228 + ... + 1428.

2⁹⁹⁴⁴²⁸ 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 994428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1312584).

994428 is an abundant number, since it is smaller than the sum of its proper divisors (1630740).

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

994428 is a wasteful number, since it uses less digits than its factorization.

994428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 1229 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 994428 is about 997.2101082520. The cubic root of 994428 is about 99.8139206261.

The spelling of 994428 in words is "nine hundred ninety-four thousand, four hundred twenty-eight".