85461890 has 16 divisors (see below), whose sum is σ = 162880632. Its totient is φ = 32173824.

The previous prime is 85461889. The next prime is 85461899. The reversal of 85461890 is 9816458.

It can be written as a sum of positive squares in 4 ways, for example, as 85063729 + 398161 = 9223^2 + 631^2 .

It is not an unprimeable number, because it can be changed into a prime (85461899) 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, 251189 + ... + 251528.

Almost surely, 2^85461890 is an apocalyptic number.

85461890 is a deficient number, since it is larger than the sum of its proper divisors (77418742).

85461890 is a wasteful number, since it uses less digits than its factorization.

85461890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502741.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 85461890 is about 9244.5600219805. The cubic root of 85461890 is about 440.4779414013.

The spelling of 85461890 in words is "eighty-five million, four hundred sixty-one thousand, eight hundred ninety".