40182138 has 48 divisors (see below), whose sum is σ = 90844416. Its totient is φ = 12821760.

The previous prime is 40182119. The next prime is 40182151. The reversal of 40182138 is 83128104.

It is a super-2 number, since 2×40182138² = 3229208428502088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59370 + ... + 60042.

It is an arithmetic number, because the mean of its divisors is an integer number (1892592).

Almost surely, 2^40182138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40182138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45422208).

40182138 is an abundant number, since it is smaller than the sum of its proper divisors (50662278).

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

40182138 is a wasteful number, since it uses less digits than its factorization.

40182138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 40182138 is about 6338.9382391691. The cubic root of 40182138 is about 342.5134894433.

The spelling of 40182138 in words is "forty million, one hundred eighty-two thousand, one hundred thirty-eight".