780409113 has 16 divisors (see below), whose sum is σ = 1184495616. Its totient is φ = 452410640.

The previous prime is 780409093. The next prime is 780409121. The reversal of 780409113 is 311904087.

It is not a de Polignac number, because 780409113 - 2⁸ = 780408857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (780409183) 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, 513345 + ... + 514862.

It is an arithmetic number, because the mean of its divisors is an integer number (74030976).

Almost surely, 2^780409113 is an apocalyptic number.

It is an amenable number.

780409113 is a deficient number, since it is larger than the sum of its proper divisors (404086503).

780409113 is a wasteful number, since it uses less digits than its factorization.

780409113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028244.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 780409113 is about 27935.8034249957. The cubic root of 780409113 is about 920.6773182544.

It can be divided in two parts, 78040 and 9113, that added together give a triangular number (87153 = T₄₁₇).

The spelling of 780409113 in words is "seven hundred eighty million, four hundred nine thousand, one hundred thirteen".