1099428 has 24 divisors (see below), whose sum is σ = 2798880. Its totient is φ = 333120.

The previous prime is 1099421. The next prime is 1099433. The reversal of 1099428 is 8249901.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1099421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4033 + ... + 4296.

It is an arithmetic number, because the mean of its divisors is an integer number (116620).

2^1099428 is an apocalyptic number.

It is an amenable number.

1099428 is an abundant number, since it is smaller than the sum of its proper divisors (1699452).

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

1099428 is a wasteful number, since it uses less digits than its factorization.

1099428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8347 (or 8345 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1099428 is about 1048.5361224107. The cubic root of 1099428 is about 103.2101155880.

The spelling of 1099428 in words is "one million, ninety-nine thousand, four hundred twenty-eight".