1428776 has 8 divisors (see below), whose sum is σ = 2678970. Its totient is φ = 714384.

The previous prime is 1428769. The next prime is 1428787. The reversal of 1428776 is 6778241.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1322500 + 106276 = 1150^2 + 326^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89291 + ... + 89306.

2^1428776 is an apocalyptic number.

It is an amenable number.

1428776 is a deficient number, since it is larger than the sum of its proper divisors (1250194).

1428776 is a wasteful number, since it uses less digits than its factorization.

1428776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178603 (or 178599 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 1428776 is about 1195.3141846393. The cubic root of 1428776 is about 112.6301637443.

The spelling of 1428776 in words is "one million, four hundred twenty-eight thousand, seven hundred seventy-six".