1428216 has 16 divisors (see below), whose sum is σ = 3570600. Its totient is φ = 476064.

The previous prime is 1428209. The next prime is 1428233. The reversal of 1428216 is 6128241.

1428216 = 19² + 20² + ... + 162².

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 59509 = 1428216 / (1 + 4 + 2 + 8 + 2 + 1 + 6).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29731 + ... + 29778.

2^1428216 is an apocalyptic number.

It is an amenable number.

1428216 is an abundant number, since it is smaller than the sum of its proper divisors (2142384).

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

1428216 is a wasteful number, since it uses less digits than its factorization.

1428216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59518 (or 59514 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 1428216 is about 1195.0799136459. The cubic root of 1428216 is about 112.6154469205.

The spelling of 1428216 in words is "one million, four hundred twenty-eight thousand, two hundred sixteen".