40494138 has 16 divisors (see below), whose sum is σ = 81401760. Its totient is φ = 13429136.

The previous prime is 40494137. The next prime is 40494151. The reversal of 40494138 is 83149404.

It is a happy number.

40494138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 40494099 and 40494108.

It is not an unprimeable number, because it can be changed into a prime (40494131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15948 + ... + 18311.

It is an arithmetic number, because the mean of its divisors is an integer number (5087610).

Almost surely, 2^40494138 is an apocalyptic number.

40494138 is an abundant number, since it is smaller than the sum of its proper divisors (40907622).

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

40494138 is a wasteful number, since it uses less digits than its factorization.

40494138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34461.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 40494138 is about 6363.5004517954. The cubic root of 40494138 is about 343.3977032878.

The spelling of 40494138 in words is "forty million, four hundred ninety-four thousand, one hundred thirty-eight".