3850534721 has 18 divisors (see below), whose sum is σ = 4340562198. Its totient is φ = 3411232000.

The previous prime is 3850534651. The next prime is 3850534733. The reversal of 3850534721 is 1274350583.

3850534721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 222159025 + 3628375696 = 14905^2 + 60236^2 .

It is not a de Polignac number, because 3850534721 - 2²⁶ = 3783425857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3850534021) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4370201 + ... + 4371081.

Almost surely, 2^3850534721 is an apocalyptic number.

It is an amenable number.

3850534721 is a deficient number, since it is larger than the sum of its proper divisors (490027477).

3850534721 is an frugal number, since it uses more digits than its factorization.

3850534721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 3850534721 is about 62052.6769849617. The cubic root of 3850534721 is about 1567.3777641421.

The spelling of 3850534721 in words is "three billion, eight hundred fifty million, five hundred thirty-four thousand, seven hundred twenty-one".