190306840 has 32 divisors (see below), whose sum is σ = 453379680. Its totient is φ = 71644672.

The previous prime is 190306811. The next prime is 190306841. The reversal of 190306840 is 48603091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190306841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139252 + ... + 140611.

It is an arithmetic number, because the mean of its divisors is an integer number (14168115).

Almost surely, 2^190306840 is an apocalyptic number.

190306840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190306840 is an abundant number, since it is smaller than the sum of its proper divisors (263072840).

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

190306840 is a wasteful number, since it uses less digits than its factorization.

190306840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279891 (or 279887 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 190306840 is about 13795.1745186496. The cubic root of 190306840 is about 575.1990136570.

The spelling of 190306840 in words is "one hundred ninety million, three hundred six thousand, eight hundred forty".