85731738 has 32 divisors (see below), whose sum is σ = 180411840. Its totient is φ = 27123840.

The previous prime is 85731733. The next prime is 85731739. The reversal of 85731738 is 83713758.

It is a self number, because there is not a number n which added to its sum of digits gives 85731738.

It is not an unprimeable number, because it can be changed into a prime (85731733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4393 + ... + 13811.

It is an arithmetic number, because the mean of its divisors is an integer number (5637870).

Almost surely, 2^85731738 is an apocalyptic number.

85731738 is an abundant number, since it is smaller than the sum of its proper divisors (94680102).

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

85731738 is a wasteful number, since it uses less digits than its factorization.

85731738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9502.

The product of its digits is 141120, while the sum is 42.

The square root of 85731738 is about 9259.1434809058. The cubic root of 85731738 is about 440.9410609166.

The spelling of 85731738 in words is "eighty-five million, seven hundred thirty-one thousand, seven hundred thirty-eight".