190685664 has 120 divisors (see below), whose sum is σ = 604046520. Its totient is φ = 58662144.

The previous prime is 190685647. The next prime is 190685687. The reversal of 190685664 is 466586091.

190685664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×190685664² = 72722044910241792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30867 + ... + 36525.

It is an arithmetic number, because the mean of its divisors is an integer number (5033721).

Almost surely, 2^190685664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190685664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302023260).

190685664 is an abundant number, since it is smaller than the sum of its proper divisors (413360856).

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

190685664 is a wasteful number, since it uses less digits than its factorization.

190685664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5694 (or 5677 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 190685664 is about 13808.8980009268. The cubic root of 190685664 is about 575.5804236083.

The spelling of 190685664 in words is "one hundred ninety million, six hundred eighty-five thousand, six hundred sixty-four".