780240117 has 16 divisors (see below), whose sum is σ = 1069009920. Its totient is φ = 505917552.

The previous prime is 780240113. The next prime is 780240119. The reversal of 780240117 is 711042087.

It is not a de Polignac number, because 780240117 - 2² = 780240113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780240113) 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, 18178 + ... + 43484.

It is an arithmetic number, because the mean of its divisors is an integer number (66813120).

Almost surely, 2^780240117 is an apocalyptic number.

It is an amenable number.

780240117 is a deficient number, since it is larger than the sum of its proper divisors (288769803).

780240117 is a wasteful number, since it uses less digits than its factorization.

780240117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25592.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 780240117 is about 27932.7785406322. The cubic root of 780240117 is about 920.6108565257.

The spelling of 780240117 in words is "seven hundred eighty million, two hundred forty thousand, one hundred seventeen".