7287638 has 4 divisors (see below), whose sum is σ = 10931460. Its totient is φ = 3643818.

The previous prime is 7287629. The next prime is 7287647. The reversal of 7287638 is 8367827.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (7287629) and next prime (7287647).

It is a junction number, because it is equal to n+sod(n) for n = 7287595 and 7287604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1821908 + ... + 1821911.

It is an arithmetic number, because the mean of its divisors is an integer number (2732865).

Almost surely, 2^7287638 is an apocalyptic number.

7287638 is a deficient number, since it is larger than the sum of its proper divisors (3643822).

7287638 is a wasteful number, since it uses less digits than its factorization.

7287638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3643821.

The product of its digits is 112896, while the sum is 41.

The square root of 7287638 is about 2699.5625571563. The cubic root of 7287638 is about 193.8781783809.

The spelling of 7287638 in words is "seven million, two hundred eighty-seven thousand, six hundred thirty-eight".