65540448 has 96 divisors (see below), whose sum is σ = 197406720. Its totient is φ = 21133440.

The previous prime is 65540429. The next prime is 65540473. The reversal of 65540448 is 84404556.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25561 + ... + 28007.

It is an arithmetic number, because the mean of its divisors is an integer number (2056320).

Almost surely, 2^65540448 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 65540448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98703360).

65540448 is an abundant number, since it is smaller than the sum of its proper divisors (131866272).

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

65540448 is a wasteful number, since it uses less digits than its factorization.

65540448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497 (or 2483 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 65540448 is about 8095.7055282415. The cubic root of 65540448 is about 403.1838570634.

The spelling of 65540448 in words is "sixty-five million, five hundred forty thousand, four hundred forty-eight".