391012242 has 16 divisors (see below), whose sum is σ = 782221440. Its totient is φ = 130304592.

The previous prime is 391012241. The next prime is 391012247. The reversal of 391012242 is 242210193.

It is not an unprimeable number, because it can be changed into a prime (391012241) 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 7 ways as a sum of consecutive naturals, for example, 35559 + ... + 45237.

It is an arithmetic number, because the mean of its divisors is an integer number (48888840).

Almost surely, 2^391012242 is an apocalyptic number.

391012242 is an abundant number, since it is smaller than the sum of its proper divisors (391209198).

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

391012242 is a wasteful number, since it uses less digits than its factorization.

391012242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16417.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 391012242 is about 19774.0294831377. The cubic root of 391012242 is about 731.2459126370.

The spelling of 391012242 in words is "three hundred ninety-one million, twelve thousand, two hundred forty-two".