65490480 has 120 divisors (see below), whose sum is σ = 239962320. Its totient is φ = 15874560.

The previous prime is 65490479. The next prime is 65490493. The reversal of 65490480 is 8409456.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3786 + ... + 12054.

It is an arithmetic number, because the mean of its divisors is an integer number (1999686).

Almost surely, 2^65490480 is an apocalyptic number.

65490480 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 65490480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119981160).

65490480 is an abundant number, since it is smaller than the sum of its proper divisors (174471840).

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

65490480 is a wasteful number, since it uses less digits than its factorization.

65490480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8299 (or 8290 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 65490480 is about 8092.6188591827. The cubic root of 65490480 is about 403.0813686328.

It can be divided in two parts, 65 and 490480, that added together give a triangular number (490545 = T₉₉₀).

The spelling of 65490480 in words is "sixty-five million, four hundred ninety thousand, four hundred eighty".