7940638 has 8 divisors (see below), whose sum is σ = 12188088. Its totient is φ = 3877944.

The previous prime is 7940629. The next prime is 7940641. The reversal of 7940638 is 8360497.

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

It is a junction number, because it is equal to n+sod(n) for n = 7940597 and 7940606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46081 + ... + 46252.

It is an arithmetic number, because the mean of its divisors is an integer number (1523511).

Almost surely, 2^7940638 is an apocalyptic number.

7940638 is a deficient number, since it is larger than the sum of its proper divisors (4247450).

7940638 is a wasteful number, since it uses less digits than its factorization.

7940638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92378.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 7940638 is about 2817.9137673108. The cubic root of 7940638 is about 199.5040880396.

The spelling of 7940638 in words is "seven million, nine hundred forty thousand, six hundred thirty-eight".