7540398 has 32 divisors (see below), whose sum is σ = 17118720. Its totient is φ = 2459160.

The previous prime is 7540391. The next prime is 7540399. The reversal of 7540398 is 8930457.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7540391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1053 + ... + 4023.

It is an arithmetic number, because the mean of its divisors is an integer number (534960).

Almost surely, 2^7540398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7540398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8559360).

7540398 is an abundant number, since it is smaller than the sum of its proper divisors (9578322).

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

7540398 is a wasteful number, since it uses less digits than its factorization.

7540398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3029 (or 3023 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 7540398 is about 2745.9785141184. The cubic root of 7540398 is about 196.0942036396.

The spelling of 7540398 in words is "seven million, five hundred forty thousand, three hundred ninety-eight".