7940491 has 8 divisors (see below), whose sum is σ = 8648640. Its totient is φ = 7246272.

The previous prime is 7940483. The next prime is 7940503. The reversal of 7940491 is 1940497.

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

It is a cyclic number.

It is not a de Polignac number, because 7940491 - 2³ = 7940483 is a prime.

7940491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7940591) 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, 2275 + ... + 4588.

It is an arithmetic number, because the mean of its divisors is an integer number (1081080).

Almost surely, 2^7940491 is an apocalyptic number.

7940491 is a deficient number, since it is larger than the sum of its proper divisors (708149).

7940491 is a wasteful number, since it uses less digits than its factorization.

7940491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6965.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 7940491 is about 2817.8876840641. The cubic root of 7940491 is about 199.5028569344.

The spelling of 7940491 in words is "seven million, nine hundred forty thousand, four hundred ninety-one".