85984540 has 24 divisors (see below), whose sum is σ = 180904752. Its totient is φ = 34329600.

The previous prime is 85984537. The next prime is 85984553. The reversal of 85984540 is 4548958.

It is a happy number.

It is a super-2 number, since 2×85984540² = 14786682238023200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7815 + ... + 15265.

It is an arithmetic number, because the mean of its divisors is an integer number (7537698).

Almost surely, 2^85984540 is an apocalyptic number.

It is an amenable number.

85984540 is an abundant number, since it is smaller than the sum of its proper divisors (94920212).

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

85984540 is a wasteful number, since it uses less digits than its factorization.

85984540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8037 (or 8035 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 85984540 is about 9272.7849106943. The cubic root of 85984540 is about 441.3740448464.

The spelling of 85984540 in words is "eighty-five million, nine hundred eighty-four thousand, five hundred forty".