7830638 has 16 divisors (see below), whose sum is σ = 12312000. Its totient is φ = 3730272.

The previous prime is 7830619. The next prime is 7830653. The reversal of 7830638 is 8360387.

It is a super-2 number, since 2×7830638² = 122637782974088, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7830598 and 7830607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3728 + ... + 5436.

It is an arithmetic number, because the mean of its divisors is an integer number (769500).

Almost surely, 2^7830638 is an apocalyptic number.

7830638 is a deficient number, since it is larger than the sum of its proper divisors (4481362).

7830638 is a wasteful number, since it uses less digits than its factorization.

7830638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 7830638 is about 2798.3277149040. The cubic root of 7830638 is about 198.5785716399.

The spelling of 7830638 in words is "seven million, eight hundred thirty thousand, six hundred thirty-eight".