40002100 has 36 divisors (see below), whose sum is σ = 87154144. Its totient is φ = 15936480.

The previous prime is 40002091. The next prime is 40002103. The reversal of 40002100 is 120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40002103) 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, 30049 + ... + 31351.

Almost surely, 2^40002100 is an apocalyptic number.

It is an amenable number.

40002100 is an abundant number, since it is smaller than the sum of its proper divisors (47152044).

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

40002100 is a wasteful number, since it uses less digits than its factorization.

40002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624 (or 1617 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 40002100 is about 6324.7213377350. The cubic root of 40002100 is about 342.0011741464.

Adding to 40002100 its reverse (120004), we get a palindrome (40122104).

The spelling of 40002100 in words is "forty million, two thousand, one hundred".