191090016 has 240 divisors, whose sum is σ = 622402704. Its totient is φ = 57148416.

The previous prime is 191089999. The next prime is 191090017. The reversal of 191090016 is 610090191.

191090016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191090017) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1785835 + ... + 1785941.

Almost surely, 2^191090016 is an apocalyptic number.

191090016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191090016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311201352).

191090016 is an abundant number, since it is smaller than the sum of its proper divisors (431312688).

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

191090016 is a wasteful number, since it uses less digits than its factorization.

191090016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 191090016 is about 13823.5312420524. The cubic root of 191090016 is about 575.9869788723.

The spelling of 191090016 in words is "one hundred ninety-one million, ninety thousand, sixteen".