7253840 has 40 divisors (see below), whose sum is σ = 18400608. Its totient is φ = 2637440.

The previous prime is 7253837. The next prime is 7253861. The reversal of 7253840 is 483527.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3242 + ... + 5001.

Almost surely, 2^7253840 is an apocalyptic number.

It is an amenable number.

7253840 is an abundant number, since it is smaller than the sum of its proper divisors (11146768).

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

7253840 is a wasteful number, since it uses less digits than its factorization.

7253840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8267 (or 8261 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 7253840 is about 2693.2953792705. The cubic root of 7253840 is about 193.5779964975.

The spelling of 7253840 in words is "seven million, two hundred fifty-three thousand, eight hundred forty".