85581730 has 16 divisors (see below), whose sum is σ = 165897144. Its totient is φ = 31599360.

The previous prime is 85581721. The next prime is 85581737. The reversal of 85581730 is 3718558.

It can be written as a sum of positive squares in 4 ways, for example, as 30569841 + 55011889 = 5529^2 + 7417^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 85581730.

It is not an unprimeable number, because it can be changed into a prime (85581737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329031 + ... + 329290.

Almost surely, 2^85581730 is an apocalyptic number.

85581730 is a deficient number, since it is larger than the sum of its proper divisors (80315414).

85581730 is a wasteful number, since it uses less digits than its factorization.

85581730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658341.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 85581730 is about 9251.0394010619. The cubic root of 85581730 is about 440.6837338000.

The spelling of 85581730 in words is "eighty-five million, five hundred eighty-one thousand, seven hundred thirty".