8991436 has 24 divisors (see below), whose sum is σ = 17388000. Its totient is φ = 4046592.

The previous prime is 8991431. The next prime is 8991439. The reversal of 8991436 is 6341998.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8991431) 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, 1311 + ... + 4438.

It is an arithmetic number, because the mean of its divisors is an integer number (724500).

Almost surely, 2^8991436 is an apocalyptic number.

It is an amenable number.

8991436 is a deficient number, since it is larger than the sum of its proper divisors (8396564).

8991436 is a wasteful number, since it uses less digits than its factorization.

8991436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5793 (or 5791 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 8991436 is about 2998.5723269583. The cubic root of 8991436 is about 207.9423841899.

The spelling of 8991436 in words is "eight million, nine hundred ninety-one thousand, four hundred thirty-six".