1428508115 has 4 divisors (see below), whose sum is σ = 1714209744. Its totient is φ = 1142806488.

The previous prime is 1428508093. The next prime is 1428508121. The reversal of 1428508115 is 5118058241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5118058241 = 751 ⋅6814991.

It is a cyclic number.

It is not a de Polignac number, because 1428508115 - 2⁶ = 1428508051 is a prime.

It is a Duffinian 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, 142850807 + ... + 142850816.

It is an arithmetic number, because the mean of its divisors is an integer number (428552436).

Almost surely, 2^1428508115 is an apocalyptic number.

1428508115 is a deficient number, since it is larger than the sum of its proper divisors (285701629).

1428508115 is an equidigital number, since it uses as much as digits as its factorization.

1428508115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285701628.

The product of its (nonzero) digits is 12800, while the sum is 35.

The square root of 1428508115 is about 37795.6097318194. The cubic root of 1428508115 is about 1126.2312419502.

The spelling of 1428508115 in words is "one billion, four hundred twenty-eight million, five hundred eight thousand, one hundred fifteen".