65087880 has 128 divisors (see below), whose sum is σ = 229461120. Its totient is φ = 14561280.

The previous prime is 65087857. The next prime is 65087929. The reversal of 65087880 is 8878056.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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 31 ways as a sum of consecutive naturals, for example, 15264 + ... + 19056.

It is an arithmetic number, because the mean of its divisors is an integer number (1792665).

Almost surely, 2^65087880 is an apocalyptic number.

65087880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65087880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114730560).

65087880 is an abundant number, since it is smaller than the sum of its proper divisors (164373240).

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

65087880 is a wasteful number, since it uses less digits than its factorization.

65087880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831 (or 3827 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 65087880 is about 8067.7059936515. The cubic root of 65087880 is about 402.2536949666.

The spelling of 65087880 in words is "sixty-five million, eighty-seven thousand, eight hundred eighty".