85720232 has 16 divisors (see below), whose sum is σ = 173089140. Its totient is φ = 39563136.

The previous prime is 85720213. The next prime is 85720237. The reversal of 85720232 is 23202758.

It can be written as a sum of positive squares in 2 ways, for example, as 74200996 + 11519236 = 8614^2 + 3394^2 .

It is a junction number, because it is equal to n+sod(n) for n = 85720195 and 85720204.

It is not an unprimeable number, because it can be changed into a prime (85720237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412013 + ... + 412220.

Almost surely, 2^85720232 is an apocalyptic number.

It is an amenable number.

85720232 is an abundant number, since it is smaller than the sum of its proper divisors (87368908).

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

85720232 is a wasteful number, since it uses less digits than its factorization.

85720232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824252 (or 824248 counting only the distinct ones).

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

The square root of 85720232 is about 9258.5221282881. The cubic root of 85720232 is about 440.9213338977.

The spelling of 85720232 in words is "eighty-five million, seven hundred twenty thousand, two hundred thirty-two".