65040384 has 104 divisors (see below), whose sum is σ = 178236160. Its totient is φ = 21086208.

The previous prime is 65040379. The next prime is 65040499. The reversal of 65040384 is 48304056.

It is a zygodrome in base 2.

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, 823257 + ... + 823335.

Almost surely, 2^65040384 is an apocalyptic number.

65040384 is a gapful number since it is divisible by the number (64) 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 65040384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89118080).

65040384 is an abundant number, since it is smaller than the sum of its proper divisors (113195776).

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

65040384 is an equidigital number, since it uses as much as digits as its factorization.

65040384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 65040384 is about 8064.7618687721. The cubic root of 65040384 is about 402.1558268197.

The spelling of 65040384 in words is "sixty-five million, forty thousand, three hundred eighty-four".