85497040 has 20 divisors (see below), whose sum is σ = 198780804. Its totient is φ = 34198784.

The previous prime is 85497037. The next prime is 85497059. The reversal of 85497040 is 4079458.

It can be written as a sum of positive squares in 2 ways, for example, as 36048016 + 49449024 = 6004^2 + 7032^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534277 + ... + 534436.

Almost surely, 2^85497040 is an apocalyptic number.

85497040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85497040 is an abundant number, since it is smaller than the sum of its proper divisors (113283764).

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

85497040 is a wasteful number, since it uses less digits than its factorization.

85497040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068726 (or 1068720 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 85497040 is about 9246.4609445993. The cubic root of 85497040 is about 440.5383218331.

The spelling of 85497040 in words is "eighty-five million, four hundred ninety-seven thousand, forty".