190591640 has 16 divisors (see below), whose sum is σ = 428831280. Its totient is φ = 76236640.

The previous prime is 190591613. The next prime is 190591651. The reversal of 190591640 is 46195091.

It is a self number, because there is not a number n which added to its sum of digits gives 190591640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2382356 + ... + 2382435.

It is an arithmetic number, because the mean of its divisors is an integer number (26801955).

Almost surely, 2^190591640 is an apocalyptic number.

190591640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190591640 is an abundant number, since it is smaller than the sum of its proper divisors (238239640).

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

190591640 is a wasteful number, since it uses less digits than its factorization.

190591640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4764802 (or 4764798 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 190591640 is about 13805.4931096285. The cubic root of 190591640 is about 575.4858049394.

The spelling of 190591640 in words is "one hundred ninety million, five hundred ninety-one thousand, six hundred forty".