190640242 has 32 divisors (see below), whose sum is σ = 322882560. Its totient is φ = 83825280.

The previous prime is 190640221. The next prime is 190640251. The reversal of 190640242 is 242046091.

It is a self number, because there is not a number n which added to its sum of digits gives 190640242.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43759 + ... + 47917.

It is an arithmetic number, because the mean of its divisors is an integer number (10090080).

Almost surely, 2^190640242 is an apocalyptic number.

190640242 is a deficient number, since it is larger than the sum of its proper divisors (132242318).

190640242 is a wasteful number, since it uses less digits than its factorization.

190640242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4258.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 190640242 is about 13807.2532387872. The cubic root of 190640242 is about 575.5347182144.

The spelling of 190640242 in words is "one hundred ninety million, six hundred forty thousand, two hundred forty-two".