85079640 has 32 divisors (see below), whose sum is σ = 255239280. Its totient is φ = 22687872.

The previous prime is 85079627. The next prime is 85079641. The reversal of 85079640 is 4697058.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85079641) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 354379 + ... + 354618.

Almost surely, 2^85079640 is an apocalyptic number.

It is an amenable number.

85079640 is an abundant number, since it is smaller than the sum of its proper divisors (170159640).

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

85079640 is a wasteful number, since it uses less digits than its factorization.

85079640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709011 (or 709007 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 85079640 is about 9223.8625314995. The cubic root of 85079640 is about 439.8202433770.

The spelling of 85079640 in words is "eighty-five million, seventy-nine thousand, six hundred forty".