7944405 has 32 divisors (see below), whose sum is σ = 15033600. Its totient is φ = 3505152.

The previous prime is 7944373. The next prime is 7944437. The reversal of 7944405 is 5044497.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7944373) and next prime (7944437).

It is not a de Polignac number, because 7944405 - 2⁵ = 7944373 is a prime.

It is a super-2 number, since 2×7944405² = 126227141608050, which contains 22 as substring.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 1741 + ... + 4349.

It is an arithmetic number, because the mean of its divisors is an integer number (469800).

Almost surely, 2^7944405 is an apocalyptic number.

It is an amenable number.

7944405 is a deficient number, since it is larger than the sum of its proper divisors (7089195).

7944405 is a wasteful number, since it uses less digits than its factorization.

7944405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 7944405 is about 2818.5820903426. The cubic root of 7944405 is about 199.5356309748.

The spelling of 7944405 in words is "seven million, nine hundred forty-four thousand, four hundred five".