9137988 has 48 divisors (see below), whose sum is σ = 23862720. Its totient is φ = 3024000.

The previous prime is 9137981. The next prime is 9138007. The reversal of 9137988 is 8897319.

9137988 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×9137988⁴ (a number of 29 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (9137981) 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, 22588 + ... + 22988.

It is an arithmetic number, because the mean of its divisors is an integer number (497140).

Almost surely, 2^9137988 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 9137988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11931360).

9137988 is an abundant number, since it is smaller than the sum of its proper divisors (14724732).

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

9137988 is a wasteful number, since it uses less digits than its factorization.

9137988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 617 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 9137988 is about 3022.9105180273. The cubic root of 9137988 is about 209.0660566670.

The spelling of 9137988 in words is "nine million, one hundred thirty-seven thousand, nine hundred eighty-eight".