9138472 has 32 divisors (see below), whose sum is σ = 19958400. Its totient is φ = 3841344.

The previous prime is 9138463. The next prime is 9138491. The reversal of 9138472 is 2748319.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1429 + ... + 4507.

It is an arithmetic number, because the mean of its divisors is an integer number (623700).

Almost surely, 2^9138472 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 9138472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9979200).

9138472 is an abundant number, since it is smaller than the sum of its proper divisors (10819928).

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

9138472 is a wasteful number, since it uses less digits than its factorization.

9138472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145 (or 3141 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 9138472 is about 3022.9905722645. The cubic root of 9138472 is about 209.0697477123.

The spelling of 9138472 in words is "nine million, one hundred thirty-eight thousand, four hundred seventy-two".