7998945 has 8 divisors (see below), whose sum is σ = 12798336. Its totient is φ = 4266096.

The previous prime is 7998941. The next prime is 7998953. The reversal of 7998945 is 5498997.

It is a happy number.

7998945 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 7998945 - 2² = 7998941 is a prime.

It is a super-2 number, since 2×7998945² = 127966242226050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7998941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266617 + ... + 266646.

It is an arithmetic number, because the mean of its divisors is an integer number (1599792).

Almost surely, 2^7998945 is an apocalyptic number.

It is an amenable number.

7998945 is a deficient number, since it is larger than the sum of its proper divisors (4799391).

7998945 is a wasteful number, since it uses less digits than its factorization.

7998945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533271.

The product of its digits is 816480, while the sum is 51.

The square root of 7998945 is about 2828.2406191836. The cubic root of 7998945 is about 199.9912079468.

The spelling of 7998945 in words is "seven million, nine hundred ninety-eight thousand, nine hundred forty-five".