7838139 has 8 divisors (see below), whose sum is σ = 11065680. Its totient is φ = 4918016.

The previous prime is 7838137. The next prime is 7838153. The reversal of 7838139 is 9318387.

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 7838139 - 2¹ = 7838137 is a prime.

It is a super-2 number, since 2×7838139² = 122872845966642, which contains 22 as substring.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 7838097 and 7838106.

It is not an unprimeable number, because it can be changed into a prime (7838137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76794 + ... + 76895.

It is an arithmetic number, because the mean of its divisors is an integer number (1383210).

Almost surely, 2^7838139 is an apocalyptic number.

7838139 is a deficient number, since it is larger than the sum of its proper divisors (3227541).

7838139 is a wasteful number, since it uses less digits than its factorization.

7838139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153709.

The product of its digits is 36288, while the sum is 39.

The square root of 7838139 is about 2799.6676588481. The cubic root of 7838139 is about 198.6419578121.

The spelling of 7838139 in words is "seven million, eight hundred thirty-eight thousand, one hundred thirty-nine".