64817420 has 24 divisors (see below), whose sum is σ = 136279584. Its totient is φ = 25895936.

The previous prime is 64817419. The next prime is 64817429. The reversal of 64817420 is 2471846.

It is not an unprimeable number, because it can be changed into a prime (64817429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23009 + ... + 25671.

It is an arithmetic number, because the mean of its divisors is an integer number (5678316).

Almost surely, 2^64817420 is an apocalyptic number.

It is an amenable number.

64817420 is an abundant number, since it is smaller than the sum of its proper divisors (71462164).

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

64817420 is a wasteful number, since it uses less digits than its factorization.

64817420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3889 (or 3887 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 64817420 is about 8050.9266547398. The cubic root of 64817420 is about 401.6957591764.

The spelling of 64817420 in words is "sixty-four million, eight hundred seventeen thousand, four hundred twenty".