190890664 has 8 divisors (see below), whose sum is σ = 357920010. Its totient is φ = 95445328.

The previous prime is 190890649. The next prime is 190890677. The reversal of 190890664 is 466098091.

It can be written as a sum of positive squares in only one way, i.e., 188512900 + 2377764 = 13730^2 + 1542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 190890664.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11930659 + ... + 11930674.

Almost surely, 2^190890664 is an apocalyptic number.

It is an amenable number.

190890664 is a deficient number, since it is larger than the sum of its proper divisors (167029346).

190890664 is a wasteful number, since it uses less digits than its factorization.

190890664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23861339 (or 23861335 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 190890664 is about 13816.3187571799. The cubic root of 190890664 is about 575.7866123795.

The spelling of 190890664 in words is "one hundred ninety million, eight hundred ninety thousand, six hundred sixty-four".