85528440 has 64 divisors (see below), whose sum is σ = 285098400. Its totient is φ = 22807296.

The previous prime is 85528439. The next prime is 85528441. The reversal of 85528440 is 4482558.

It is an interprime number because it is at equal distance from previous prime (85528439) and next prime (85528441).

It is a super-2 number, since 2×85528440² = 14630228097667200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 85528395 and 85528404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85528441) 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 15 ways as a sum of consecutive naturals, for example, 38517 + ... + 40676.

Almost surely, 2^85528440 is an apocalyptic number.

It is an amenable number.

85528440 is an abundant number, since it is smaller than the sum of its proper divisors (199569960).

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

85528440 is a wasteful number, since it uses less digits than its factorization.

85528440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79213 (or 79203 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 85528440 is about 9248.1587356619. The cubic root of 85528440 is about 440.5922465468.

The spelling of 85528440 in words is "eighty-five million, five hundred twenty-eight thousand, four hundred forty".