65059840 has 88 divisors (see below), whose sum is σ = 158879952. Its totient is φ = 25559040.

The previous prime is 65059777. The next prime is 65059843. The reversal of 65059840 is 4895056.

It is a self number, because there is not a number n which added to its sum of digits gives 65059840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65059843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496575 + ... + 496705.

It is an arithmetic number, because the mean of its divisors is an integer number (1805454).

Almost surely, 2^65059840 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 65059840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79439976).

65059840 is an abundant number, since it is smaller than the sum of its proper divisors (93820112).

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

65059840 is a wasteful number, since it uses less digits than its factorization.

65059840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 65059840 is about 8065.9680138220. The cubic root of 65059840 is about 402.1959227480.

The spelling of 65059840 in words is "sixty-five million, fifty-nine thousand, eight hundred forty".