7443640 has 32 divisors (see below), whose sum is σ = 16990560. Its totient is φ = 2934400.

The previous prime is 7443629. The next prime is 7443643. The reversal of 7443640 is 463447.

It is a junction number, because it is equal to n+sod(n) for n = 7443599 and 7443608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7443643) 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, 1530 + ... + 4150.

It is an arithmetic number, because the mean of its divisors is an integer number (530955).

Almost surely, 2^7443640 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 7443640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8495280).

7443640 is an abundant number, since it is smaller than the sum of its proper divisors (9546920).

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

7443640 is a wasteful number, since it uses less digits than its factorization.

7443640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703 (or 2699 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 7443640 is about 2728.3035021786. The cubic root of 7443640 is about 195.2518332967.

The spelling of 7443640 in words is "seven million, four hundred forty-three thousand, six hundred forty".