64420441 has 8 divisors (see below), whose sum is σ = 66330824. Its totient is φ = 62519040.

The previous prime is 64420427. The next prime is 64420451. The reversal of 64420441 is 14402446.

It can be written as a sum of positive squares in 4 ways, for example, as 1058841 + 63361600 = 1029^2 + 7960^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64420441 - 2²⁵ = 30866009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64420451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14011 + ... + 18031.

It is an arithmetic number, because the mean of its divisors is an integer number (8291353).

Almost surely, 2^64420441 is an apocalyptic number.

It is an amenable number.

64420441 is a deficient number, since it is larger than the sum of its proper divisors (1910383).

64420441 is a wasteful number, since it uses less digits than its factorization.

64420441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4491.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 64420441 is about 8026.2345467847. The cubic root of 64420441 is about 400.8740076357.

Adding to 64420441 its reverse (14402446), we get a palindrome (78822887).

The spelling of 64420441 in words is "sixty-four million, four hundred twenty thousand, four hundred forty-one".