7249920 has 112 divisors (see below), whose sum is σ = 23591520. Its totient is φ = 1900544.

The previous prime is 7249919. The next prime is 7249927. The reversal of 7249920 is 299427.

It is a super-2 number, since 2×7249920² = 105122680012800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7249927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122851 + ... + 122909.

Almost surely, 2^7249920 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 7249920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11795760).

7249920 is an abundant number, since it is smaller than the sum of its proper divisors (16341600).

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

7249920 is an equidigital number, since it uses as much as digits as its factorization.

7249920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 7249920 is about 2692.5675478992. The cubic root of 7249920 is about 193.5431201434.

The spelling of 7249920 in words is "seven million, two hundred forty-nine thousand, nine hundred twenty".