3830721 has 8 divisors (see below), whose sum is σ = 5245824. Its totient is φ = 2484720.

The previous prime is 3830713. The next prime is 3830731. The reversal of 3830721 is 1270383.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3830721 - 2³ = 3830713 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 3830691 and 3830700.

It is not an unprimeable number, because it can be changed into a prime (3830711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17145 + ... + 17366.

It is an arithmetic number, because the mean of its divisors is an integer number (655728).

Almost surely, 2^3830721 is an apocalyptic number.

It is an amenable number.

3830721 is a deficient number, since it is larger than the sum of its proper divisors (1415103).

3830721 is a wasteful number, since it uses less digits than its factorization.

3830721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34551.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 3830721 is about 1957.2227773046. Note that the first 3 decimals coincide. The cubic root of 3830721 is about 156.4684717728.

The spelling of 3830721 in words is "three million, eight hundred thirty thousand, seven hundred twenty-one".