7638731 has 8 divisors (see below), whose sum is σ = 7865424. Its totient is φ = 7415200.

The previous prime is 7638727. The next prime is 7638733. The reversal of 7638731 is 1378367.

7638731 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 not a de Polignac number, because 7638731 - 2² = 7638727 is a prime.

It is a super-2 number, since 2×7638731² = 116700422580722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7638691 and 7638700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7638733) 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, 4640 + ... + 6066.

It is an arithmetic number, because the mean of its divisors is an integer number (983178).

Almost surely, 2^7638731 is an apocalyptic number.

7638731 is a deficient number, since it is larger than the sum of its proper divisors (226693).

7638731 is a wasteful number, since it uses less digits than its factorization.

7638731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581.

The product of its digits is 21168, while the sum is 35.

The square root of 7638731 is about 2763.8254286405. The cubic root of 7638731 is about 196.9429348487.

The spelling of 7638731 in words is "seven million, six hundred thirty-eight thousand, seven hundred thirty-one".