64241620 has 24 divisors (see below), whose sum is σ = 138555144. Its totient is φ = 25001856.

The previous prime is 64241609. The next prime is 64241633. The reversal of 64241620 is 2614246.

It can be written as a sum of positive squares in 4 ways, for example, as 24147396 + 40094224 = 4914^2 + 6332^2 .

It is a congruent number.

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, 42667 + ... + 44146.

It is an arithmetic number, because the mean of its divisors is an integer number (5773131).

Almost surely, 2^64241620 is an apocalyptic number.

It is an amenable number.

64241620 is an abundant number, since it is smaller than the sum of its proper divisors (74313524).

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

64241620 is a wasteful number, since it uses less digits than its factorization.

64241620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86859 (or 86857 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 64241620 is about 8015.0870238569. The cubic root of 64241620 is about 400.5027428593.

Adding to 64241620 its reverse (2614246), we get a palindrome (66855866).

The spelling of 64241620 in words is "sixty-four million, two hundred forty-one thousand, six hundred twenty".