40840104 has 64 divisors (see below), whose sum is σ = 105416640. Its totient is φ = 13178880.

The previous prime is 40840099. The next prime is 40840109. The reversal of 40840104 is 40104804.

It is an interprime number because it is at equal distance from previous prime (40840099) and next prime (40840109).

It is not an unprimeable number, because it can be changed into a prime (40840109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123219 + ... + 123549.

It is an arithmetic number, because the mean of its divisors is an integer number (1647135).

Almost surely, 2^40840104 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 40840104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52708320).

40840104 is an abundant number, since it is smaller than the sum of its proper divisors (64576536).

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

40840104 is a wasteful number, since it uses less digits than its factorization.

40840104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 40840104 is about 6390.6262603911. The cubic root of 40840104 is about 344.3728830254.

Adding to 40840104 its reverse (40104804), we get a palindrome (80944908).

The spelling of 40840104 in words is "forty million, eight hundred forty thousand, one hundred four".