85237040 has 80 divisors (see below), whose sum is σ = 238437120. Its totient is φ = 27682560.

The previous prime is 85237039. The next prime is 85237079. The reversal of 85237040 is 4073258.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 85236994 and 85237012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6635 + ... + 14645.

It is an arithmetic number, because the mean of its divisors is an integer number (2980464).

Almost surely, 2^85237040 is an apocalyptic number.

85237040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85237040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119218560).

85237040 is an abundant number, since it is smaller than the sum of its proper divisors (153200080).

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

85237040 is a wasteful number, since it uses less digits than its factorization.

85237040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050 (or 8044 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 85237040 is about 9232.3908062863. The cubic root of 85237040 is about 440.0913033666.

The spelling of 85237040 in words is "eighty-five million, two hundred thirty-seven thousand, forty".