65919240 has 96 divisors (see below), whose sum is σ = 217339200. Its totient is φ = 17324160.

The previous prime is 65919229. The next prime is 65919241. The reversal of 65919240 is 4291956.

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

It is a junction number, because it is equal to n+sod(n) for n = 65919195 and 65919204.

It is not an unprimeable number, because it can be changed into a prime (65919241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24271 + ... + 26849.

It is an arithmetic number, because the mean of its divisors is an integer number (2263950).

Almost surely, 2^65919240 is an apocalyptic number.

65919240 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 65919240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108669600).

65919240 is an abundant number, since it is smaller than the sum of its proper divisors (151419960).

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

65919240 is a wasteful number, since it uses less digits than its factorization.

65919240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667 (or 2660 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 65919240 is about 8119.0664487982. The cubic root of 65919240 is about 403.9591011762.

The spelling of 65919240 in words is "sixty-five million, nine hundred nineteen thousand, two hundred forty".