7408991 has 8 divisors (see below), whose sum is σ = 8057520. Its totient is φ = 6784128.

The previous prime is 7408937. The next prime is 7408997. The reversal of 7408991 is 1998047.

7408991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7408991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7408997) by changing a digit.

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, 5261 + ... + 6518.

It is an arithmetic number, because the mean of its divisors is an integer number (1007190).

Almost surely, 2^7408991 is an apocalyptic number.

7408991 is a deficient number, since it is larger than the sum of its proper divisors (648529).

7408991 is a wasteful number, since it uses less digits than its factorization.

7408991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11833.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 7408991 is about 2721.9461787478. The cubic root of 7408991 is about 194.9484062495.

The spelling of 7408991 in words is "seven million, four hundred eight thousand, nine hundred ninety-one".