85787690 has 32 divisors (see below), whose sum is σ = 158457600. Its totient is φ = 33424704.

The previous prime is 85787659. The next prime is 85787743. The reversal of 85787690 is 9678758.

It is a happy number.

It is a super-2 number, since 2×85787690² = 14719055511072200, which contains 22 as substring.

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, 163769 + ... + 164291.

It is an arithmetic number, because the mean of its divisors is an integer number (4951800).

Almost surely, 2^85787690 is an apocalyptic number.

85787690 is a deficient number, since it is larger than the sum of its proper divisors (72669910).

85787690 is a wasteful number, since it uses less digits than its factorization.

85787690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 85787690 is about 9262.1644338675. The cubic root of 85787690 is about 441.0369653799.

The spelling of 85787690 in words is "eighty-five million, seven hundred eighty-seven thousand, six hundred ninety".