85297740 has 144 divisors (see below), whose sum is σ = 271703040. Its totient is φ = 19958400.

The previous prime is 85297739. The next prime is 85297757. The reversal of 85297740 is 4779258.

It is a junction number, because it is equal to n+sod(n) for n = 85297692 and 85297701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 224871 + ... + 225249.

Almost surely, 2^85297740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85297740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135851520).

85297740 is an abundant number, since it is smaller than the sum of its proper divisors (186405300).

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

85297740 is a wasteful number, since it uses less digits than its factorization.

85297740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 431 counting only the distinct ones).

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

The square root of 85297740 is about 9235.6775604175. The cubic root of 85297740 is about 440.1957462373.

The spelling of 85297740 in words is "eighty-five million, two hundred ninety-seven thousand, seven hundred forty".