7890442 has 16 divisors (see below), whose sum is σ = 13571712. Its totient is φ = 3370320.

The previous prime is 7890439. The next prime is 7890479. The reversal of 7890442 is 2440987.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7890398 and 7890407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4467 + ... + 5977.

It is an arithmetic number, because the mean of its divisors is an integer number (848232).

Almost surely, 2^7890442 is an apocalyptic number.

7890442 is a deficient number, since it is larger than the sum of its proper divisors (5681270).

7890442 is a wasteful number, since it uses less digits than its factorization.

7890442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 7890442 is about 2808.9930580192. The cubic root of 7890442 is about 199.0828169728.

The spelling of 7890442 in words is "seven million, eight hundred ninety thousand, four hundred forty-two".