7398640 has 40 divisors (see below), whose sum is σ = 17954208. Its totient is φ = 2830080.

The previous prime is 7398613. The next prime is 7398647. The reversal of 7398640 is 468937.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 7398640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7398647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171 + ... + 3850.

Almost surely, 2^7398640 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 7398640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8977104).

7398640 is an abundant number, since it is smaller than the sum of its proper divisors (10555568).

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

7398640 is a wasteful number, since it uses less digits than its factorization.

7398640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057 (or 4051 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 7398640 is about 2720.0441172893. The cubic root of 7398640 is about 194.8575773537.

The spelling of 7398640 in words is "seven million, three hundred ninety-eight thousand, six hundred forty".