85500240 has 80 divisors (see below), whose sum is σ = 302921088. Its totient is φ = 19542528.

The previous prime is 85500227. The next prime is 85500251. The reversal of 85500240 is 4200558.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 85500240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23767 + ... + 27126.

Almost surely, 2^85500240 is an apocalyptic number.

85500240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85500240 is an abundant number, since it is smaller than the sum of its proper divisors (217420848).

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

85500240 is a wasteful number, since it uses less digits than its factorization.

85500240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50916 (or 50910 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 85500240 is about 9246.6339821580. The cubic root of 85500240 is about 440.5438179495.

Adding to 85500240 its reverse (4200558), we get a palindrome (89700798).

The spelling of 85500240 in words is "eighty-five million, five hundred thousand, two hundred forty".