7944820 has 24 divisors (see below), whose sum is σ = 17968104. Its totient is φ = 2933376.

The previous prime is 7944799. The next prime is 7944841. The reversal of 7944820 is 284497.

It is a happy number.

7944820 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7944799) and next prime (7944841).

It can be written as a sum of positive squares in 4 ways, for example, as 138384 + 7806436 = 372^2 + 2794^2 .

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, 15019 + ... + 15538.

It is an arithmetic number, because the mean of its divisors is an integer number (748671).

Almost surely, 2^7944820 is an apocalyptic number.

It is an amenable number.

7944820 is an abundant number, since it is smaller than the sum of its proper divisors (10023284).

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

7944820 is a wasteful number, since it uses less digits than its factorization.

7944820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30579 (or 30577 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 7944820 is about 2818.6557079573. The cubic root of 7944820 is about 199.5391053632.

The spelling of 7944820 in words is "seven million, nine hundred forty-four thousand, eight hundred twenty".