7944387 has 8 divisors (see below), whose sum is σ = 11555520. Its totient is φ = 4814760.

The previous prime is 7944373. The next prime is 7944437. The reversal of 7944387 is 7834497.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7944387 - 2⁷ = 7944259 is a prime.

It is a super-2 number, since 2×7944387² = 126226569611538, which contains 22 as substring.

7944387 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7944317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120337 + ... + 120402.

It is an arithmetic number, because the mean of its divisors is an integer number (1444440).

Almost surely, 2^7944387 is an apocalyptic number.

7944387 is a deficient number, since it is larger than the sum of its proper divisors (3611133).

7944387 is a wasteful number, since it uses less digits than its factorization.

7944387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240753.

The product of its digits is 169344, while the sum is 42.

The square root of 7944387 is about 2818.5788972459. The cubic root of 7944387 is about 199.5354802757.

The spelling of 7944387 in words is "seven million, nine hundred forty-four thousand, three hundred eighty-seven".