85457440 has 48 divisors (see below), whose sum is σ = 212526720. Its totient is φ = 32382720.

The previous prime is 85457423. The next prime is 85457447. The reversal of 85457440 is 4475458.

It is a self number, because there is not a number n which added to its sum of digits gives 85457440.

It is not an unprimeable number, because it can be changed into a prime (85457447) 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 7 ways as a sum of consecutive naturals, for example, 11016 + ... + 17095.

It is an arithmetic number, because the mean of its divisors is an integer number (4427640).

Almost surely, 2^85457440 is an apocalyptic number.

85457440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85457440 is an abundant number, since it is smaller than the sum of its proper divisors (127069280).

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

85457440 is a wasteful number, since it uses less digits than its factorization.

85457440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28145 (or 28137 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 37.

The square root of 85457440 is about 9244.3193367603. The cubic root of 85457440 is about 440.4702960409.

The spelling of 85457440 in words is "eighty-five million, four hundred fifty-seven thousand, four hundred forty".