85490128 has 20 divisors (see below), whose sum is σ = 170114980. Its totient is φ = 41589504.

The previous prime is 85490123. The next prime is 85490129. The reversal of 85490128 is 82109458.

It can be written as a sum of positive squares in 2 ways, for example, as 82955664 + 2534464 = 9108^2 + 1592^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85490123) 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, 71613 + ... + 72796.

It is an arithmetic number, because the mean of its divisors is an integer number (8505749).

Almost surely, 2^85490128 is an apocalyptic number.

It is an amenable number.

85490128 is a deficient number, since it is larger than the sum of its proper divisors (84624852).

85490128 is a wasteful number, since it uses less digits than its factorization.

85490128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144454 (or 144448 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 85490128 is about 9246.0871724206. The cubic root of 85490128 is about 440.5264497537.

The spelling of 85490128 in words is "eighty-five million, four hundred ninety thousand, one hundred twenty-eight".