7920442 has 8 divisors (see below), whose sum is σ = 12201876. Its totient is φ = 3853152.

The previous prime is 7920433. The next prime is 7920443. The reversal of 7920442 is 2440297.

It can be written as a sum of positive squares in 2 ways, for example, as 6355441 + 1565001 = 2521^2 + 1251^2 .

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 7920442.

It is not an unprimeable number, because it can be changed into a prime (7920443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53443 + ... + 53590.

Almost surely, 2^7920442 is an apocalyptic number.

7920442 is a deficient number, since it is larger than the sum of its proper divisors (4281434).

7920442 is a wasteful number, since it uses less digits than its factorization.

7920442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107072.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 7920442 is about 2814.3279837290. The cubic root of 7920442 is about 199.3348067089.

The spelling of 7920442 in words is "seven million, nine hundred twenty thousand, four hundred forty-two".