85780506 has 16 divisors (see below), whose sum is σ = 196069824. Its totient is φ = 24508704.

The previous prime is 85780481. The next prime is 85780511. The reversal of 85780506 is 60508758.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021155 + ... + 1021238.

It is an arithmetic number, because the mean of its divisors is an integer number (12254364).

Almost surely, 2^85780506 is an apocalyptic number.

85780506 is an abundant number, since it is smaller than the sum of its proper divisors (110289318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85780506 is a wasteful number, since it uses less digits than its factorization.

85780506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042405.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 85780506 is about 9261.7766114283. The cubic root of 85780506 is about 441.0246539865.

The spelling of 85780506 in words is "eighty-five million, seven hundred eighty thousand, five hundred six".