64220189 has 16 divisors (see below), whose sum is σ = 73875456. Its totient is φ = 55282800.

The previous prime is 64220183. The next prime is 64220201. The reversal of 64220189 is 98102246.

It is a cyclic number.

It is not a de Polignac number, because 64220189 - 2¹² = 64216093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64220183) 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, 14024 + ... + 18030.

It is an arithmetic number, because the mean of its divisors is an integer number (4617216).

Almost surely, 2^64220189 is an apocalyptic number.

It is an amenable number.

64220189 is a deficient number, since it is larger than the sum of its proper divisors (9655267).

64220189 is a wasteful number, since it uses less digits than its factorization.

64220189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 64220189 is about 8013.7499961005. The cubic root of 64220189 is about 400.4582020102.

The spelling of 64220189 in words is "sixty-four million, two hundred twenty thousand, one hundred eighty-nine".