810428 has 18 divisors (see below), whose sum is σ = 1486464. Its totient is φ = 386584.

The previous prime is 810427. The next prime is 810437. The reversal of 810428 is 824018.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1925 + ... + 2307.

2⁸¹⁰⁴²⁸ is an apocalyptic number.

It is an amenable number.

810428 is a deficient number, since it is larger than the sum of its proper divisors (676036).

810428 is a wasteful number, since it uses less digits than its factorization.

810428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 810428 is about 900.2377463759. The cubic root of 810428 is about 93.2333907508.

The spelling of 810428 in words is "eight hundred ten thousand, four hundred twenty-eight".