1428144 has 20 divisors (see below), whose sum is σ = 3689496. Its totient is φ = 476032.

The previous prime is 1428143. The next prime is 1428151. The reversal of 1428144 is 4418241.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1428143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14829 + ... + 14924.

2^1428144 is an apocalyptic number.

It is an amenable number.

1428144 is an abundant number, since it is smaller than the sum of its proper divisors (2261352).

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

1428144 is a wasteful number, since it uses less digits than its factorization.

1428144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29764 (or 29758 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

The square root of 1428144 is about 1195.0497897577. The cubic root of 1428144 is about 112.6135544784.

The spelling of 1428144 in words is "one million, four hundred twenty-eight thousand, one hundred forty-four".