7998642 has 16 divisors (see below), whose sum is σ = 17774880. Its totient is φ = 2666196.

The previous prime is 7998637. The next prime is 7998643. The reversal of 7998642 is 2468997.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7998643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74008 + ... + 74115.

It is an arithmetic number, because the mean of its divisors is an integer number (1110930).

Almost surely, 2^7998642 is an apocalyptic number.

7998642 is an abundant number, since it is smaller than the sum of its proper divisors (9776238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7998642 is a wasteful number, since it uses less digits than its factorization.

7998642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148134 (or 148128 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 7998642 is about 2828.1870518054. The cubic root of 7998642 is about 199.9886826929.

The spelling of 7998642 in words is "seven million, nine hundred ninety-eight thousand, six hundred forty-two".