85091690 has 32 divisors (see below), whose sum is σ = 163296000. Its totient is φ = 31831488.

The previous prime is 85091689. The next prime is 85091693. The reversal of 85091690 is 9619058.

It is a super-2 number, since 2×85091690² = 14481191414112200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (85091693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12176 + ... + 17844.

It is an arithmetic number, because the mean of its divisors is an integer number (5103000).

Almost surely, 2^85091690 is an apocalyptic number.

85091690 is a deficient number, since it is larger than the sum of its proper divisors (78204310).

85091690 is a wasteful number, since it uses less digits than its factorization.

85091690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5774.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 85091690 is about 9224.5157054449. The cubic root of 85091690 is about 439.8410066045.

The spelling of 85091690 in words is "eighty-five million, ninety-one thousand, six hundred ninety".