65415420 has 144 divisors (see below), whose sum is σ = 228795840. Its totient is φ = 14819328.

The previous prime is 65415379. The next prime is 65415431. The reversal of 65415420 is 2451456.

65415420 is a `hidden beast` number, since 654 + 1 + 5 + 4 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 243046 + ... + 243314.

It is an arithmetic number, because the mean of its divisors is an integer number (1588860).

Almost surely, 2^65415420 is an apocalyptic number.

65415420 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 65415420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114397920).

65415420 is an abundant number, since it is smaller than the sum of its proper divisors (163380420).

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

65415420 is a wasteful number, since it uses less digits than its factorization.

65415420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 65415420 is about 8087.9799703016. The cubic root of 65415420 is about 402.9273164528.

Adding to 65415420 its reverse (2451456), we get a palindrome (67866876).

The spelling of 65415420 in words is "sixty-five million, four hundred fifteen thousand, four hundred twenty".