85220970 has 16 divisors (see below), whose sum is σ = 204530400. Its totient is φ = 22725584.

The previous prime is 85220963. The next prime is 85220977. The reversal of 85220970 is 7902258.

It is an interprime number because it is at equal distance from previous prime (85220963) and next prime (85220977).

It is a super-2 number, since 2×85220970² = 14525227455481800, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85220977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420320 + ... + 1420379.

It is an arithmetic number, because the mean of its divisors is an integer number (12783150).

Almost surely, 2^85220970 is an apocalyptic number.

85220970 is an abundant number, since it is smaller than the sum of its proper divisors (119309430).

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

85220970 is a wasteful number, since it uses less digits than its factorization.

85220970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840709.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 85220970 is about 9231.5204598159. The cubic root of 85220970 is about 440.0636443749.

The spelling of 85220970 in words is "eighty-five million, two hundred twenty thousand, nine hundred seventy".