117889515 has 48 divisors (see below), whose sum is σ = 211120416. Its totient is φ = 60825600.

The previous prime is 117889507. The next prime is 117889517. The reversal of 117889515 is 515988711.

It is not a de Polignac number, because 117889515 - 2³ = 117889507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (117889517) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 183595 + ... + 184235.

It is an arithmetic number, because the mean of its divisors is an integer number (4398342).

Almost surely, 2^117889515 is an apocalyptic number.

117889515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

117889515 is a deficient number, since it is larger than the sum of its proper divisors (93230901).

117889515 is a wasteful number, since it uses less digits than its factorization.

117889515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 777 counting only the distinct ones).

The product of its digits is 100800, while the sum is 45.

The square root of 117889515 is about 10857.6938159077. The cubic root of 117889515 is about 490.3336821983. Note that the first 3 decimals are identical.

The spelling of 117889515 in words is "one hundred seventeen million, eight hundred eighty-nine thousand, five hundred fifteen".