4091209902 has 96 divisors (see below), whose sum is σ = 10182830112. Its totient is φ = 1175980032.

The previous prime is 4091209901. The next prime is 4091209907. The reversal of 4091209902 is 2099021904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091209901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 541233 + ... + 548739.

It is an arithmetic number, because the mean of its divisors is an integer number (106071147).

Almost surely, 2^4091209902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4091209902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5091415056).

4091209902 is an abundant number, since it is smaller than the sum of its proper divisors (6091620210).

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

4091209902 is a wasteful number, since it uses less digits than its factorization.

4091209902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7682 (or 7679 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 4091209902 is about 63962.5664119257. The cubic root of 4091209902 is about 1599.3760460304.

The spelling of 4091209902 in words is "four billion, ninety-one million, two hundred nine thousand, nine hundred two".