40791864 has 96 divisors (see below), whose sum is σ = 110373120. Its totient is φ = 12550272.

The previous prime is 40791827. The next prime is 40791869. The reversal of 40791864 is 46819704.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40791869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 867889 + ... + 867935.

It is an arithmetic number, because the mean of its divisors is an integer number (1149720).

Almost surely, 2^40791864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40791864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55186560).

40791864 is an abundant number, since it is smaller than the sum of its proper divisors (69581256).

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

40791864 is a wasteful number, since it uses less digits than its factorization.

40791864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 40791864 is about 6386.8508672115. The cubic root of 40791864 is about 344.2372394511.

The spelling of 40791864 in words is "forty million, seven hundred ninety-one thousand, eight hundred sixty-four".