7420644 has 72 divisors (see below), whose sum is σ = 23395008. Its totient is φ = 1926720.

The previous prime is 7420643. The next prime is 7420661. The reversal of 7420644 is 4460247.

7420644 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (7420643) 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, 1434 + ... + 4110.

Almost surely, 2^7420644 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 7420644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11697504).

7420644 is an abundant number, since it is smaller than the sum of its proper divisors (15974364).

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

7420644 is a wasteful number, since it uses less digits than its factorization.

7420644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705 (or 2700 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 7420644 is about 2724.0859017292. The cubic root of 7420644 is about 195.0505588823.

The spelling of 7420644 in words is "seven million, four hundred twenty thousand, six hundred forty-four".