1428684291 has 16 divisors (see below), whose sum is σ = 2117176320. Its totient is φ = 952183080.

The previous prime is 1428684281. The next prime is 1428684311. The reversal of 1428684291 is 1924868241.

1428684291 is a `hidden beast` number, since 1 + 4 + 286 + 84 + 291 = 666.

It is not a de Polignac number, because 1428684291 - 2⁷ = 1428684163 is a prime.

It is a super-2 number, since 2×1428684291² = 4082277606700345362, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1428684221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141766 + ... + 151508.

It is an arithmetic number, because the mean of its divisors is an integer number (132323520).

Almost surely, 2^1428684291 is an apocalyptic number.

1428684291 is a deficient number, since it is larger than the sum of its proper divisors (688492029).

1428684291 is an equidigital number, since it uses as much as digits as its factorization.

1428684291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15183 (or 15177 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 1428684291 is about 37797.9403010270. The cubic root of 1428684291 is about 1126.2775389125.

The spelling of 1428684291 in words is "one billion, four hundred twenty-eight million, six hundred eighty-four thousand, two hundred ninety-one".