65490120 has 320 divisors, whose sum is σ = 246985200. Its totient is φ = 15482880.

The previous prime is 65490109. The next prime is 65490127. The reversal of 65490120 is 2109456.

65490120 is a `hidden beast` number, since 654 + 9 + 0 + 1 + 2 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 20412324 + 45077796 = 4518^2 + 6714^2 .

It is a super-2 number, since 2×65490120² = 8577911635228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (65490127) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1597300 + ... + 1597340.

Almost surely, 2^65490120 is an apocalyptic number.

65490120 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 65490120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123492600).

65490120 is an abundant number, since it is smaller than the sum of its proper divisors (181495080).

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

65490120 is a wasteful number, since it uses less digits than its factorization.

65490120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 65490120 is about 8092.5966166614. The cubic root of 65490120 is about 403.0806300544.

Adding to 65490120 its reverse (2109456), we get a palindrome (67599576).

The spelling of 65490120 in words is "sixty-five million, four hundred ninety thousand, one hundred twenty".