899428 has 12 divisors (see below), whose sum is σ = 1596672. Its totient is φ = 443240.

The previous prime is 899413. The next prime is 899429. The reversal of 899428 is 824998.

It is a happy number.

It is an Ulam number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (899429) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1300 + ... + 1867.

It is an arithmetic number, because the mean of its divisors is an integer number (133056).

2⁸⁹⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

899428 is a deficient number, since it is larger than the sum of its proper divisors (697244).

899428 is a wasteful number, since it uses less digits than its factorization.

899428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242 (or 3240 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 899428 is about 948.3817796647. The cubic root of 899428 is about 96.5284800544.

Adding to 899428 its product of digits (41472), we get a square (940900 = 970²).

The spelling of 899428 in words is "eight hundred ninety-nine thousand, four hundred twenty-eight".