1428143217 has 16 divisors (see below), whose sum is σ = 1927800000. Its totient is φ = 940315904.

The previous prime is 1428143183. The next prime is 1428143239. The reversal of 1428143217 is 7123418241.

It is a cyclic number.

It is not a de Polignac number, because 1428143217 - 2¹² = 1428139121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1428143287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277534 + ... + 282632.

It is an arithmetic number, because the mean of its divisors is an integer number (120487500).

Almost surely, 2^1428143217 is an apocalyptic number.

It is an amenable number.

1428143217 is a deficient number, since it is larger than the sum of its proper divisors (499656783).

1428143217 is a wasteful number, since it uses less digits than its factorization.

1428143217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6240.

The product of its digits is 10752, while the sum is 33.

The square root of 1428143217 is about 37790.7821697302. The cubic root of 1428143217 is about 1126.1353389774.

The spelling of 1428143217 in words is "one billion, four hundred twenty-eight million, one hundred forty-three thousand, two hundred seventeen".