64189190 has 32 divisors (see below), whose sum is σ = 127473696. Its totient is φ = 23120640.

The previous prime is 64189187. The next prime is 64189207. The reversal of 64189190 is 9198146.

It is a happy number.

It is a super-2 number, since 2×64189190² = 8240504225712200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 692 + ... + 11351.

It is an arithmetic number, because the mean of its divisors is an integer number (3983553).

Almost surely, 2^64189190 is an apocalyptic number.

64189190 is a deficient number, since it is larger than the sum of its proper divisors (63284506).

64189190 is a wasteful number, since it uses less digits than its factorization.

64189190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12104.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 64189190 is about 8011.8156494018. The cubic root of 64189190 is about 400.3937580926.

The spelling of 64189190 in words is "sixty-four million, one hundred eighty-nine thousand, one hundred ninety".