780700085 has 16 divisors (see below), whose sum is σ = 1027372032. Its totient is φ = 564801600.

The previous prime is 780700069. The next prime is 780700093. The reversal of 780700085 is 580007087.

It is not a de Polignac number, because 780700085 - 2⁴ = 780700069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26654 + ... + 47663.

It is an arithmetic number, because the mean of its divisors is an integer number (64210752).

Almost surely, 2^780700085 is an apocalyptic number.

It is an amenable number.

780700085 is a deficient number, since it is larger than the sum of its proper divisors (246671947).

780700085 is a wasteful number, since it uses less digits than its factorization.

780700085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74524.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 780700085 is about 27941.0108084872. The cubic root of 780700085 is about 920.7917274914.

The spelling of 780700085 in words is "seven hundred eighty million, seven hundred thousand, eighty-five".