40811004 has 144 divisors (see below), whose sum is σ = 119857920. Its totient is φ = 11612160.

The previous prime is 40811003. The next prime is 40811011. The reversal of 40811004 is 40011804.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40811003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 420684 + ... + 420780.

Almost surely, 2^40811004 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 40811004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59928960).

40811004 is an abundant number, since it is smaller than the sum of its proper divisors (79046916).

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

40811004 is a wasteful number, since it uses less digits than its factorization.

40811004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 40811004 is about 6388.3490825095. The cubic root of 40811004 is about 344.2910710234.

Adding to 40811004 its reverse (40011804), we get a palindrome (80822808).

The spelling of 40811004 in words is "forty million, eight hundred eleven thousand, four".