7940649 has 8 divisors (see below), whose sum is σ = 11210400. Its totient is φ = 4982336.

The previous prime is 7940641. The next prime is 7940663. The reversal of 7940649 is 9460497.

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 7940649 - 2³ = 7940641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7940641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77799 + ... + 77900.

It is an arithmetic number, because the mean of its divisors is an integer number (1401300).

Almost surely, 2^7940649 is an apocalyptic number.

It is an amenable number.

7940649 is a deficient number, since it is larger than the sum of its proper divisors (3269751).

7940649 is a wasteful number, since it uses less digits than its factorization.

7940649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155719.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 7940649 is about 2817.9157191087. The cubic root of 7940649 is about 199.5041801625.

The spelling of 7940649 in words is "seven million, nine hundred forty thousand, six hundred forty-nine".