85240040 has 32 divisors (see below), whose sum is σ = 203073480. Its totient is φ = 32090112.

The previous prime is 85240033. The next prime is 85240063. The reversal of 85240040 is 4004258.

It can be written as a sum of positive squares in 4 ways, for example, as 78818884 + 6421156 = 8878^2 + 2534^2 .

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 85239988 and 85240015.

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 7 ways as a sum of consecutive naturals, for example, 61997 + ... + 63356.

Almost surely, 2^85240040 is an apocalyptic number.

It is an amenable number.

85240040 is an abundant number, since it is smaller than the sum of its proper divisors (117833440).

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

85240040 is a wasteful number, since it uses less digits than its factorization.

85240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125381 (or 125377 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 85240040 is about 9232.5532763153. The cubic root of 85240040 is about 440.0964664523.

Adding to 85240040 its reverse (4004258), we get a palindrome (89244298).

The spelling of 85240040 in words is "eighty-five million, two hundred forty thousand, forty".