1428508117 has 16 divisors (see below), whose sum is σ = 1525962240. Its totient is φ = 1334995200.

The previous prime is 1428508093. The next prime is 1428508121. The reversal of 1428508117 is 7118058241.

It is not a de Polignac number, because 1428508117 - 2¹¹ = 1428506069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428508157) 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, 112617 + ... + 124657.

It is an arithmetic number, because the mean of its divisors is an integer number (95372640).

Almost surely, 2^1428508117 is an apocalyptic number.

It is an amenable number.

1428508117 is a deficient number, since it is larger than the sum of its proper divisors (97454123).

1428508117 is a wasteful number, since it uses less digits than its factorization.

1428508117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12204.

The product of its (nonzero) digits is 17920, while the sum is 37.

The square root of 1428508117 is about 37795.6097582775. The cubic root of 1428508117 is about 1126.2312424758.

It can be divided in two parts, 1428 and 508117, that added together give a triangular number (509545 = T₁₀₀₉).

The spelling of 1428508117 in words is "one billion, four hundred twenty-eight million, five hundred eight thousand, one hundred seventeen".