64112420 has 24 divisors (see below), whose sum is σ = 134790264. Its totient is φ = 25615616.

The previous prime is 64112401. The next prime is 64112497. The reversal of 64112420 is 2421146.

It can be written as a sum of positive squares in 4 ways, for example, as 24068836 + 40043584 = 4906^2 + 6328^2 .

It is a super-2 number, since 2×64112420² = 8220804796512800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 64112392 and 64112401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27542 + ... + 29778.

It is an arithmetic number, because the mean of its divisors is an integer number (5616261).

Almost surely, 2^64112420 is an apocalyptic number.

It is an amenable number.

64112420 is an abundant number, since it is smaller than the sum of its proper divisors (70677844).

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

64112420 is a wasteful number, since it uses less digits than its factorization.

64112420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679 (or 3677 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 64112420 is about 8007.0231671952. The cubic root of 64112420 is about 400.2340713331.

Adding to 64112420 its reverse (2421146), we get a palindrome (66533566).

The spelling of 64112420 in words is "sixty-four million, one hundred twelve thousand, four hundred twenty".