3573721306 has 16 divisors (see below), whose sum is σ = 5412619080. Its totient is φ = 1769532480.

The previous prime is 3573721303. The next prime is 3573721337. The reversal of 3573721306 is 6031273753.

It can be written as a sum of positive squares in 4 ways, for example, as 3445103025 + 128618281 = 58695^2 + 11341^2 .

It is not an unprimeable number, because it can be changed into a prime (3573721303) 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, 606816 + ... + 612676.

Almost surely, 2^3573721306 is an apocalyptic number.

3573721306 is a deficient number, since it is larger than the sum of its proper divisors (1838897774).

3573721306 is a wasteful number, since it uses less digits than its factorization.

3573721306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8769.

The product of its (nonzero) digits is 79380, while the sum is 37.

The square root of 3573721306 is about 59780.6097827715. The cubic root of 3573721306 is about 1528.8805666669.

The spelling of 3573721306 in words is "three billion, five hundred seventy-three million, seven hundred twenty-one thousand, three hundred six".