490040042 has 4 divisors (see below), whose sum is σ = 735060066. Its totient is φ = 245020020.

The previous prime is 490040009. The next prime is 490040059. The reversal of 490040042 is 240040094.

It is a happy number.

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., 281266441 + 208773601 = 16771^2 + 14449^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 122510009 + ... + 122510012.

Almost surely, 2^490040042 is an apocalyptic number.

490040042 is a deficient number, since it is larger than the sum of its proper divisors (245020024).

490040042 is a wasteful number, since it uses less digits than its factorization.

490040042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245020023.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 490040042 is about 22136.8480592879. The cubic root of 490040042 is about 788.3949905911.

The spelling of 490040042 in words is "four hundred ninety million, forty thousand, forty-two".