64185020 has 48 divisors (see below), whose sum is σ = 137985120. Its totient is φ = 25073664.

The previous prime is 64185007. The next prime is 64185029. The reversal of 64185020 is 2058146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64185029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190292 + ... + 190628.

It is an arithmetic number, because the mean of its divisors is an integer number (2874690).

Almost surely, 2^64185020 is an apocalyptic number.

It is an amenable number.

64185020 is an abundant number, since it is smaller than the sum of its proper divisors (73800100).

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

64185020 is a wasteful number, since it uses less digits than its factorization.

64185020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 64185020 is about 8011.5554045391. Note that the first 3 decimals coincide. The cubic root of 64185020 is about 400.3850874834.

The spelling of 64185020 in words is "sixty-four million, one hundred eighty-five thousand, twenty".