85487220 has 288 divisors, whose sum is σ = 339026688. Its totient is φ = 16920576.

The previous prime is 85487209. The next prime is 85487231. The reversal of 85487220 is 2278458.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85487209) and next prime (85487231).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 278307 + ... + 278613.

It is an arithmetic number, because the mean of its divisors is an integer number (1177176).

Almost surely, 2^85487220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85487220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169513344).

85487220 is an abundant number, since it is smaller than the sum of its proper divisors (253539468).

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

85487220 is a wasteful number, since it uses less digits than its factorization.

85487220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 85487220 is about 9245.9299153736. The cubic root of 85487220 is about 440.5214547698.

The spelling of 85487220 in words is "eighty-five million, four hundred eighty-seven thousand, two hundred twenty".