8991142 has 8 divisors (see below), whose sum is σ = 14196600. Its totient is φ = 4258944.

The previous prime is 8991139. The next prime is 8991149. The reversal of 8991142 is 2411998.

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

It is a junction number, because it is equal to n+sod(n) for n = 8991098 and 8991107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8991149) 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, 118267 + ... + 118342.

It is an arithmetic number, because the mean of its divisors is an integer number (1774575).

Almost surely, 2^8991142 is an apocalyptic number.

8991142 is a deficient number, since it is larger than the sum of its proper divisors (5205458).

8991142 is a wasteful number, since it uses less digits than its factorization.

8991142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236630.

The product of its digits is 5184, while the sum is 34.

The square root of 8991142 is about 2998.5233032278. The cubic root of 8991142 is about 207.9401177470.

The spelling of 8991142 in words is "eight million, nine hundred ninety-one thousand, one hundred forty-two".