242390186 has 16 divisors (see below), whose sum is σ = 371879424. Its totient is φ = 118438224.

The previous prime is 242390173. The next prime is 242390189. The reversal of 242390186 is 681093242.

242390186 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×242390186² = 117506004538229192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (242390189) 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, 78671 + ... + 81693.

It is an arithmetic number, because the mean of its divisors is an integer number (23242464).

Almost surely, 2^242390186 is an apocalyptic number.

242390186 is a deficient number, since it is larger than the sum of its proper divisors (129489238).

242390186 is a wasteful number, since it uses less digits than its factorization.

242390186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3925.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 242390186 is about 15568.8851880923. The cubic root of 242390186 is about 623.5027079040.

The spelling of 242390186 in words is "two hundred forty-two million, three hundred ninety thousand, one hundred eighty-six".