40556238 has 16 divisors (see below), whose sum is σ = 81305856. Its totient is φ = 13486520.

The previous prime is 40556233. The next prime is 40556249. The reversal of 40556238 is 83265504.

It is a junction number, because it is equal to n+sod(n) for n = 40556199 and 40556208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40556231) 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, 5256 + ... + 10427.

It is an arithmetic number, because the mean of its divisors is an integer number (5081616).

Almost surely, 2^40556238 is an apocalyptic number.

40556238 is an abundant number, since it is smaller than the sum of its proper divisors (40749618).

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

40556238 is a wasteful number, since it uses less digits than its factorization.

40556238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16119.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 40556238 is about 6368.3779724511. The cubic root of 40556238 is about 343.5731534203.

The spelling of 40556238 in words is "forty million, five hundred fifty-six thousand, two hundred thirty-eight".