85780845 has 12 divisors (see below), whose sum is σ = 148686876. Its totient is φ = 45749760.

The previous prime is 85780843. The next prime is 85780847. The reversal of 85780845 is 54808758.

It is an interprime number because it is at equal distance from previous prime (85780843) and next prime (85780847).

It can be written as a sum of positive squares in 2 ways, for example, as 37380996 + 48399849 = 6114^2 + 6957^2 .

It is not a de Polignac number, because 85780845 - 2¹ = 85780843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1906241 = 85780845 / (8 + 5 + 7 + 8 + 0 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 85780845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85780841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 953076 + ... + 953165.

It is an arithmetic number, because the mean of its divisors is an integer number (12390573).

Almost surely, 2^85780845 is an apocalyptic number.

It is an amenable number.

85780845 is a deficient number, since it is larger than the sum of its proper divisors (62906031).

85780845 is a wasteful number, since it uses less digits than its factorization.

85780845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906252 (or 1906249 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The square root of 85780845 is about 9261.7949124346. The cubic root of 85780845 is about 441.0252349544.

The spelling of 85780845 in words is "eighty-five million, seven hundred eighty thousand, eight hundred forty-five".