85287690 has 24 divisors (see below), whose sum is σ = 221748228. Its totient is φ = 22743360.

The previous prime is 85287673. The next prime is 85287757. The reversal of 85287690 is 9678258.

It can be written as a sum of positive squares in 2 ways, for example, as 84879369 + 408321 = 9213^2 + 639^2 .

It is a super-2 number, since 2×85287690² = 14547980131072200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 11 ways as a sum of consecutive naturals, for example, 473731 + ... + 473910.

Almost surely, 2^85287690 is an apocalyptic number.

85287690 is an abundant number, since it is smaller than the sum of its proper divisors (136460538).

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

85287690 is a wasteful number, since it uses less digits than its factorization.

85287690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947654 (or 947651 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 85287690 is about 9235.1334587000. The cubic root of 85287690 is about 440.1784572250.

The spelling of 85287690 in words is "eighty-five million, two hundred eighty-seven thousand, six hundred ninety".