40591938 has 32 divisors (see below), whose sum is σ = 85075200. Its totient is φ = 12894336.

The previous prime is 40591933. The next prime is 40591939. The reversal of 40591938 is 83919504.

It is a junction number, because it is equal to n+sod(n) for n = 40591896 and 40591905.

It is not an unprimeable number, because it can be changed into a prime (40591931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12270 + ... + 15222.

It is an arithmetic number, because the mean of its divisors is an integer number (2658600).

Almost surely, 2^40591938 is an apocalyptic number.

40591938 is an abundant number, since it is smaller than the sum of its proper divisors (44483262).

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

40591938 is a wasteful number, since it uses less digits than its factorization.

40591938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 40591938 is about 6371.1802674230. The cubic root of 40591938 is about 343.6739349933.

The spelling of 40591938 in words is "forty million, five hundred ninety-one thousand, nine hundred thirty-eight".