1428840817 has 16 divisors (see below), whose sum is σ = 1495716480. Its totient is φ = 1363219200.

The previous prime is 1428840797. The next prime is 1428840821. The reversal of 1428840817 is 7180488241.

It is a cyclic number.

It is not a de Polignac number, because 1428840817 - 2¹¹ = 1428838769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428840887) 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, 2067442 + ... + 2068132.

It is an arithmetic number, because the mean of its divisors is an integer number (93482280).

Almost surely, 2^1428840817 is an apocalyptic number.

It is an amenable number.

1428840817 is a deficient number, since it is larger than the sum of its proper divisors (66875663).

1428840817 is a wasteful number, since it uses less digits than its factorization.

1428840817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464.

The product of its (nonzero) digits is 114688, while the sum is 43.

The square root of 1428840817 is about 37800.0108068768. The cubic root of 1428840817 is about 1126.3186688951.

The spelling of 1428840817 in words is "one billion, four hundred twenty-eight million, eight hundred forty thousand, eight hundred seventeen".