361640042 has 4 divisors (see below), whose sum is σ = 542460066. Its totient is φ = 180820020.

The previous prime is 361640039. The next prime is 361640051. The reversal of 361640042 is 240046163.

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., 360202441 + 1437601 = 18979^2 + 1199^2 .

It is a junction number, because it is equal to n+sod(n) for n = 361639993 and 361640020.

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 as a sum of consecutive naturals, namely, 90410009 + ... + 90410012.

Almost surely, 2^361640042 is an apocalyptic number.

361640042 is a deficient number, since it is larger than the sum of its proper divisors (180820024).

361640042 is a wasteful number, since it uses less digits than its factorization.

361640042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180820023.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 361640042 is about 19016.8357515124. The cubic root of 361640042 is about 712.4572939213.

The spelling of 361640042 in words is "three hundred sixty-one million, six hundred forty thousand, forty-two".