7249440 has 96 divisors (see below), whose sum is σ = 24929856. Its totient is φ = 1756160.

The previous prime is 7249427. The next prime is 7249441. The reversal of 7249440 is 449427.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 7249398 and 7249407.

It is not an unprimeable number, because it can be changed into a prime (7249441) 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 15 ways as a sum of consecutive naturals, for example, 4594 + ... + 5966.

It is an arithmetic number, because the mean of its divisors is an integer number (259686).

Almost surely, 2^7249440 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 7249440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12464928).

7249440 is an abundant number, since it is smaller than the sum of its proper divisors (17680416).

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

7249440 is a wasteful number, since it uses less digits than its factorization.

7249440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402 (or 1394 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 7249440 is about 2692.4784121697. The cubic root of 7249440 is about 193.5388487056.

The spelling of 7249440 in words is "seven million, two hundred forty-nine thousand, four hundred forty".