64460020 has 24 divisors (see below), whose sum is σ = 135581544. Its totient is φ = 25742976.

The previous prime is 64460003. The next prime is 64460047. The reversal of 64460020 is 2006446.

It can be written as a sum of positive squares in 4 ways, for example, as 22391824 + 42068196 = 4732^2 + 6486^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64459973 and 64460000.

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, 12462 + ... + 16858.

It is an arithmetic number, because the mean of its divisors is an integer number (5649231).

Almost surely, 2^64460020 is an apocalyptic number.

It is an amenable number.

64460020 is an abundant number, since it is smaller than the sum of its proper divisors (71121524).

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

64460020 is a wasteful number, since it uses less digits than its factorization.

64460020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5139 (or 5137 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 64460020 is about 8028.6997701994. The cubic root of 64460020 is about 400.9560879190.

Adding to 64460020 its reverse (2006446), we get a palindrome (66466466).

The spelling of 64460020 in words is "sixty-four million, four hundred sixty thousand, twenty".