64208620 has 36 divisors (see below), whose sum is σ = 156854880. Its totient is φ = 22014048.

The previous prime is 64208603. The next prime is 64208621. The reversal of 64208620 is 2680246.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64208621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31780 + ... + 33739.

It is an arithmetic number, because the mean of its divisors is an integer number (4357080).

Almost surely, 2^64208620 is an apocalyptic number.

It is an amenable number.

64208620 is an abundant number, since it is smaller than the sum of its proper divisors (92646260).

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

64208620 is a wasteful number, since it uses less digits than its factorization.

64208620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65542 (or 65533 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 64208620 is about 8013.0281417202. The cubic root of 64208620 is about 400.4341536061.

Adding to 64208620 its reverse (2680246), we get a palindrome (66888866).

The spelling of 64208620 in words is "sixty-four million, two hundred eight thousand, six hundred twenty".