1120428 has 18 divisors (see below), whose sum is σ = 2832284. Its totient is φ = 373464.

The previous prime is 1120423. The next prime is 1120429. The reversal of 1120428 is 8240211.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1120428.

It is not an unprimeable number, because it can be changed into a prime (1120423) 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, 15526 + ... + 15597.

2^1120428 is an apocalyptic number.

1120428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1120428 is an abundant number, since it is smaller than the sum of its proper divisors (1711856).

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

1120428 is a wasteful number, since it uses less digits than its factorization.

1120428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31133 (or 31128 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1120428 is about 1058.5027161042. The cubic root of 1120428 is about 103.8631088492.

Adding to 1120428 its reverse (8240211), we get a palindrome (9360639).

The spelling of 1120428 in words is "one million, one hundred twenty thousand, four hundred twenty-eight".