117028385 has 4 divisors (see below), whose sum is σ = 140434068. Its totient is φ = 93622704.

The previous prime is 117028381. The next prime is 117028411. The reversal of 117028385 is 583820711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583820711 = 139 ⋅4200149.

It can be written as a sum of positive squares in 2 ways, for example, as 87684496 + 29343889 = 9364^2 + 5417^2 .

It is a cyclic number.

It is not a de Polignac number, because 117028385 - 2² = 117028381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117028381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11702834 + ... + 11702843.

It is an arithmetic number, because the mean of its divisors is an integer number (35108517).

Almost surely, 2^117028385 is an apocalyptic number.

It is an amenable number.

117028385 is a deficient number, since it is larger than the sum of its proper divisors (23405683).

117028385 is an equidigital number, since it uses as much as digits as its factorization.

117028385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23405682.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 117028385 is about 10817.9658439098. The cubic root of 117028385 is about 489.1368742378.

The spelling of 117028385 in words is "one hundred seventeen million, twenty-eight thousand, three hundred eighty-five".