7830138 has 16 divisors (see below), whose sum is σ = 15732000. Its totient is φ = 2598096.

The previous prime is 7830127. The next prime is 7830157. The reversal of 7830138 is 8310387.

It is a super-2 number, since 2×7830138² = 122622122198088, which contains 22 as substring.

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, 1513 + ... + 4236.

It is an arithmetic number, because the mean of its divisors is an integer number (983250).

Almost surely, 2^7830138 is an apocalyptic number.

7830138 is an abundant number, since it is smaller than the sum of its proper divisors (7901862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7830138 is a wasteful number, since it uses less digits than its factorization.

7830138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5981.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 7830138 is about 2798.2383744063. The cubic root of 7830138 is about 198.5743450197.

Subtracting 7830138 from its reverse (8310387), we obtain a square (480249 = 693²).

The spelling of 7830138 in words is "seven million, eight hundred thirty thousand, one hundred thirty-eight".