85651040 has 24 divisors (see below), whose sum is σ = 202350960. Its totient is φ = 34260352.

The previous prime is 85651037. The next prime is 85651043. The reversal of 85651040 is 4015658.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85651037) and next prime (85651043).

It is a super-2 number, since 2×85651040² = 14672201306163200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85650994 and 85651012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85651043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267500 + ... + 267819.

It is an arithmetic number, because the mean of its divisors is an integer number (8431290).

Almost surely, 2^85651040 is an apocalyptic number.

85651040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85651040 is an abundant number, since it is smaller than the sum of its proper divisors (116699920).

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

85651040 is a wasteful number, since it uses less digits than its factorization.

85651040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535334 (or 535326 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 85651040 is about 9254.7847084630. The cubic root of 85651040 is about 440.8026670809.

Adding to 85651040 its reverse (4015658), we get a palindrome (89666698).

The spelling of 85651040 in words is "eighty-five million, six hundred fifty-one thousand, forty".