190993866 has 24 divisors (see below), whose sum is σ = 444353760. Its totient is φ = 54569592.

The previous prime is 190993849. The next prime is 190993897. The reversal of 190993866 is 668399091.

190993866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324526 + ... + 325113.

It is an arithmetic number, because the mean of its divisors is an integer number (18514740).

Almost surely, 2^190993866 is an apocalyptic number.

190993866 is an abundant number, since it is smaller than the sum of its proper divisors (253359894).

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

190993866 is a wasteful number, since it uses less digits than its factorization.

190993866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649658 (or 649651 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 190993866 is about 13820.0530389720. The cubic root of 190993866 is about 575.8903569758.

The spelling of 190993866 in words is "one hundred ninety million, nine hundred ninety-three thousand, eight hundred sixty-six".