85015720 has 16 divisors (see below), whose sum is σ = 191285460. Its totient is φ = 34006272.

The previous prime is 85015717. The next prime is 85015753. The reversal of 85015720 is 2751058.

It can be written as a sum of positive squares in 2 ways, for example, as 77475204 + 7540516 = 8802^2 + 2746^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1062657 + ... + 1062736.

Almost surely, 2^85015720 is an apocalyptic number.

It is an amenable number.

85015720 is an abundant number, since it is smaller than the sum of its proper divisors (106269740).

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

85015720 is a wasteful number, since it uses less digits than its factorization.

85015720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125404 (or 2125400 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 85015720 is about 9220.3969545785. The cubic root of 85015720 is about 439.7100707068.

Adding to 85015720 its reverse (2751058), we get a palindrome (87766778).

The spelling of 85015720 in words is "eighty-five million, fifteen thousand, seven hundred twenty".