65040420 has 96 divisors (see below), whose sum is σ = 195148800. Its totient is φ = 16136064.

The previous prime is 65040379. The next prime is 65040499. The reversal of 65040420 is 2404056.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66777 + ... + 67743.

It is an arithmetic number, because the mean of its divisors is an integer number (2032800).

Almost surely, 2^65040420 is an apocalyptic number.

65040420 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 65040420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97574400).

65040420 is an abundant number, since it is smaller than the sum of its proper divisors (130108380).

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

65040420 is a wasteful number, since it uses less digits than its factorization.

65040420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057 (or 1055 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 65040420 is about 8064.7641007038. The cubic root of 65040420 is about 402.1559010178.

Adding to 65040420 its reverse (2404056), we get a palindrome (67444476).

The spelling of 65040420 in words is "sixty-five million, forty thousand, four hundred twenty".