7944642 has 28 divisors (see below), whose sum is σ = 17870550. Its totient is φ = 2647728.

The previous prime is 7944631. The next prime is 7944653. The reversal of 7944642 is 2464497.

7944642 is a `hidden beast` number, since 7 + 9 + 4 + 4 + 642 = 666.

7944642 is digitally balanced in base 4, 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 (7944631) and next prime (7944653).

It can be written as a sum of positive squares in only one way, i.e., 7733961 + 210681 = 2781^2 + 459^2 .

It is a super-3 number, since 3×7944642³ (a number of 22 digits) contains 333 as substring.

It is a d-powerful number, because it can be written as 7⁸ + 9³ + 4 + 4⁷ + 6² + 4⁸ + 2²¹ .

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 7944597 and 7944606.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1267 + ... + 4182.

Almost surely, 2^7944642 is an apocalyptic number.

7944642 is an abundant number, since it is smaller than the sum of its proper divisors (9925908).

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

7944642 is an equidigital number, since it uses as much as digits as its factorization.

7944642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5469 (or 5454 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 7944642 is about 2818.6241324448. The cubic root of 7944642 is about 199.5376151584.

The spelling of 7944642 in words is "seven million, nine hundred forty-four thousand, six hundred forty-two".