1428428 has 6 divisors (see below), whose sum is σ = 2499756. Its totient is φ = 714212.

The previous prime is 1428419. The next prime is 1428431. The reversal of 1428428 is 8248241.

It is a self number, because there is not a number n which added to its sum of digits gives 1428428.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178550 + ... + 178557.

It is an arithmetic number, because the mean of its divisors is an integer number (416626).

2^1428428 is an apocalyptic number.

It is an amenable number.

1428428 is a deficient number, since it is larger than the sum of its proper divisors (1071328).

1428428 is a wasteful number, since it uses less digits than its factorization.

1428428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357111 (or 357109 counting only the distinct ones).

The product of its digits is 4096, while the sum is 29.

The square root of 1428428 is about 1195.1686073521. The cubic root of 1428428 is about 112.6210187420.

The spelling of 1428428 in words is "one million, four hundred twenty-eight thousand, four hundred twenty-eight".