4099749820 has 12 divisors (see below), whose sum is σ = 8609474664. Its totient is φ = 1639899920.

The previous prime is 4099749809. The next prime is 4099749821. The reversal of 4099749820 is 289479904.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4099749821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102493726 + ... + 102493765.

It is an arithmetic number, because the mean of its divisors is an integer number (717456222).

Almost surely, 2^4099749820 is an apocalyptic number.

It is an amenable number.

4099749820 is an abundant number, since it is smaller than the sum of its proper divisors (4509724844).

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

4099749820 is a wasteful number, since it uses less digits than its factorization.

4099749820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204987500 (or 204987498 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 4099749820 is about 64029.2887669385. The cubic root of 4099749820 is about 1600.4881088909.

The spelling of 4099749820 in words is "four billion, ninety-nine million, seven hundred forty-nine thousand, eight hundred twenty".