190721012 has 48 divisors (see below), whose sum is σ = 364183680. Its totient is φ = 87091200.

The previous prime is 190720997. The next prime is 190721017. The reversal of 190721012 is 210127091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190721017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301937 + ... + 302567.

It is an arithmetic number, because the mean of its divisors is an integer number (7587160).

Almost surely, 2^190721012 is an apocalyptic number.

It is an amenable number.

190721012 is a deficient number, since it is larger than the sum of its proper divisors (173462668).

190721012 is a wasteful number, since it uses less digits than its factorization.

190721012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 190721012 is about 13810.1778409983. The cubic root of 190721012 is about 575.6159871274.

The spelling of 190721012 in words is "one hundred ninety million, seven hundred twenty-one thousand, twelve".