7988861 has 8 divisors (see below), whose sum is σ = 8483904. Its totient is φ = 7496640.

The previous prime is 7988857. The next prime is 7988899. The reversal of 7988861 is 1688897.

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

It is a cyclic number.

It is not a de Polignac number, because 7988861 - 2² = 7988857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7988801) 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, 9296 + ... + 10118.

It is an arithmetic number, because the mean of its divisors is an integer number (1060488).

Almost surely, 2^7988861 is an apocalyptic number.

It is an amenable number.

7988861 is a deficient number, since it is larger than the sum of its proper divisors (495043).

7988861 is a wasteful number, since it uses less digits than its factorization.

7988861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411.

The product of its digits is 193536, while the sum is 47.

The square root of 7988861 is about 2826.4573232228. The cubic root of 7988861 is about 199.9071318842.

The spelling of 7988861 in words is "seven million, nine hundred eighty-eight thousand, eight hundred sixty-one".