9139812 has 48 divisors (see below), whose sum is σ = 24639552. Its totient is φ = 2606080.

The previous prime is 9139811. The next prime is 9139841. The reversal of 9139812 is 2189319.

9139812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (9139811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208 + ... + 4280.

It is an arithmetic number, because the mean of its divisors is an integer number (513324).

Almost surely, 2^9139812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9139812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12319776).

9139812 is an abundant number, since it is smaller than the sum of its proper divisors (15499740).

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

9139812 is a wasteful number, since it uses less digits than its factorization.

9139812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4108 (or 4106 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The square root of 9139812 is about 3023.2121989698. The cubic root of 9139812 is about 209.0799660424.

It can be divided in two parts, 91 and 39812, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 9139812 in words is "nine million, one hundred thirty-nine thousand, eight hundred twelve".