3726109821 has 32 divisors (see below), whose sum is σ = 5869846528. Its totient is φ = 2057425920.

The previous prime is 3726109771. The next prime is 3726109853. The reversal of 3726109821 is 1289016273.

It is not a de Polignac number, because 3726109821 - 2¹¹ = 3726107773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3726109821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3726109021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469341 + ... + 477213.

It is an arithmetic number, because the mean of its divisors is an integer number (183432704).

Almost surely, 2^3726109821 is an apocalyptic number.

3726109821 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3726109821 is a deficient number, since it is larger than the sum of its proper divisors (2143736707).

3726109821 is a wasteful number, since it uses less digits than its factorization.

3726109821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8641.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 3726109821 is about 61041.8694094472. The cubic root of 3726109821 is about 1550.3100068103.

The spelling of 3726109821 in words is "three billion, seven hundred twenty-six million, one hundred nine thousand, eight hundred twenty-one".