40042100 has 36 divisors (see below), whose sum is σ = 99306144. Its totient is φ = 13728480.

The previous prime is 40042099. The next prime is 40042109. The reversal of 40042100 is 124004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40042109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27902 + ... + 29301.

It is an arithmetic number, because the mean of its divisors is an integer number (2758504).

Almost surely, 2^40042100 is an apocalyptic number.

It is an amenable number.

40042100 is an abundant number, since it is smaller than the sum of its proper divisors (59264044).

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

40042100 is a wasteful number, since it uses less digits than its factorization.

40042100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57224 (or 57217 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 40042100 is about 6327.8827422764. The cubic root of 40042100 is about 342.1151305780.

Adding to 40042100 its reverse (124004), we get a palindrome (40166104).

The spelling of 40042100 in words is "forty million, forty-two thousand, one hundred".