8991402 has 64 divisors (see below), whose sum is σ = 22291200. Its totient is φ = 2408448.

The previous prime is 8991401. The next prime is 8991431. The reversal of 8991402 is 2041998.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8991401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34858 + ... + 35114.

It is an arithmetic number, because the mean of its divisors is an integer number (348300).

Almost surely, 2^8991402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8991402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11145600).

8991402 is an abundant number, since it is smaller than the sum of its proper divisors (13299798).

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

8991402 is a wasteful number, since it uses less digits than its factorization.

8991402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 8991402 is about 2998.5666575883. The cubic root of 8991402 is about 207.9421220868.

The spelling of 8991402 in words is "eight million, nine hundred ninety-one thousand, four hundred two".