7931290442 has 8 divisors (see below), whose sum is σ = 11898384996. Its totient is φ = 3965162112.

The previous prime is 7931290439. The next prime is 7931290459. The reversal of 7931290442 is 2440921397.

It can be written as a sum of positive squares in 2 ways, for example, as 6334408921 + 1596881521 = 79589^2 + 39961^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7931290442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220673 + ... + 254084.

Almost surely, 2^7931290442 is an apocalyptic number.

7931290442 is a deficient number, since it is larger than the sum of its proper divisors (3967094554).

7931290442 is a wasteful number, since it uses less digits than its factorization.

7931290442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483112.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 7931290442 is about 89057.7927078815. The cubic root of 7931290442 is about 1994.2577324604.

The spelling of 7931290442 in words is "seven billion, nine hundred thirty-one million, two hundred ninety thousand, four hundred forty-two".