86945540 has 48 divisors (see below), whose sum is σ = 200176704. Its totient is φ = 31459200.

The previous prime is 86945519. The next prime is 86945549. The reversal of 86945540 is 4554968.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (86945549) 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 15 ways as a sum of consecutive naturals, for example, 49070 + ... + 50810.

It is an arithmetic number, because the mean of its divisors is an integer number (4170348).

Almost surely, 2^86945540 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 86945540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100088352).

86945540 is an abundant number, since it is smaller than the sum of its proper divisors (113231164).

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

86945540 is a wasteful number, since it uses less digits than its factorization.

86945540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988 (or 1986 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 86945540 is about 9324.4592336500. The cubic root of 86945540 is about 443.0122850722.

The spelling of 86945540 in words is "eighty-six million, nine hundred forty-five thousand, five hundred forty".