8409138 has 16 divisors (see below), whose sum is σ = 17273280. Its totient is φ = 2727216.

The previous prime is 8409133. The next prime is 8409173. The reversal of 8409138 is 8319048.

It is a junction number, because it is equal to n+sod(n) for n = 8409099 and 8409108.

It is not an unprimeable number, because it can be changed into a prime (8409133) 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, 18718 + ... + 19161.

It is an arithmetic number, because the mean of its divisors is an integer number (1079580).

Almost surely, 2^8409138 is an apocalyptic number.

8409138 is an abundant number, since it is smaller than the sum of its proper divisors (8864142).

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

8409138 is a wasteful number, since it uses less digits than its factorization.

8409138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37921.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 8409138 is about 2899.8513755019. The cubic root of 8409138 is about 203.3529575852.

The spelling of 8409138 in words is "eight million, four hundred nine thousand, one hundred thirty-eight".