85072040 has 16 divisors (see below), whose sum is σ = 191412180. Its totient is φ = 34028800.

The previous prime is 85072033. The next prime is 85072061. The reversal of 85072040 is 4027058.

It can be written as a sum of positive squares in 2 ways, for example, as 79530724 + 5541316 = 8918^2 + 2354^2 .

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, 1063361 + ... + 1063440.

Almost surely, 2^85072040 is an apocalyptic number.

It is an amenable number.

85072040 is an abundant number, since it is smaller than the sum of its proper divisors (106340140).

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

85072040 is a wasteful number, since it uses less digits than its factorization.

85072040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126812 (or 2126808 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 85072040 is about 9223.4505473819. The cubic root of 85072040 is about 439.8071468893.

Adding to 85072040 its reverse (4027058), we get a palindrome (89099098).

The spelling of 85072040 in words is "eighty-five million, seventy-two thousand, forty".