3721440447 has 12 divisors (see below), whose sum is σ = 5376849504. Its totient is φ = 2480297760.

The previous prime is 3721440433. The next prime is 3721440469. The reversal of 3721440447 is 7440441273.

It is a happy number.

3721440447 is a `hidden beast` number, since 3 + 72 + 144 + 0 + 447 = 666.

It is not a de Polignac number, because 3721440447 - 2²⁷ = 3587222719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721440407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18343 + ... + 88200.

It is an arithmetic number, because the mean of its divisors is an integer number (448070792).

Almost surely, 2^3721440447 is an apocalyptic number.

3721440447 is a deficient number, since it is larger than the sum of its proper divisors (1655409057).

3721440447 is a wasteful number, since it uses less digits than its factorization.

3721440447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110430 (or 110427 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 36.

The square root of 3721440447 is about 61003.6101144842. The cubic root of 3721440447 is about 1549.6621458567.

The spelling of 3721440447 in words is "three billion, seven hundred twenty-one million, four hundred forty thousand, four hundred forty-seven".