390941242 has 4 divisors (see below), whose sum is σ = 586411866. Its totient is φ = 195470620.

The previous prime is 390941233. The next prime is 390941249. The reversal of 390941242 is 242149093.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 255008961 + 135932281 = 15969^2 + 11659^2 .

It is a junction number, because it is equal to n+sod(n) for n = 390941198 and 390941207.

It is not an unprimeable number, because it can be changed into a prime (390941249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97735309 + ... + 97735312.

Almost surely, 2^390941242 is an apocalyptic number.

390941242 is a deficient number, since it is larger than the sum of its proper divisors (195470624).

390941242 is a wasteful number, since it uses less digits than its factorization.

390941242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195470623.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 390941242 is about 19772.2341175700. The cubic root of 390941242 is about 731.2016500820.

The spelling of 390941242 in words is "three hundred ninety million, nine hundred forty-one thousand, two hundred forty-two".