7445520 has 120 divisors (see below), whose sum is σ = 25998336. Its totient is φ = 1980288.

The previous prime is 7445519. The next prime is 7445521. The reversal of 7445520 is 255447.

It is an interprime number because it is at equal distance from previous prime (7445519) and next prime (7445521).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (7445521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19249 + ... + 19631.

Almost surely, 2^7445520 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 7445520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12999168).

7445520 is an abundant number, since it is smaller than the sum of its proper divisors (18552816).

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

7445520 is a wasteful number, since it uses less digits than its factorization.

7445520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 7445520 is about 2728.6480168758. The cubic root of 7445520 is about 195.2682698138.

The spelling of 7445520 in words is "seven million, four hundred forty-five thousand, five hundred twenty".