3728790581 has 2 divisors, whose sum is σ = 3728790582. Its totient is φ = 3728790580.

The previous prime is 3728790517. The next prime is 3728790631. The reversal of 3728790581 is 1850978273.

It is an a-pointer prime, because the next prime (3728790631) can be obtained adding 3728790581 to its sum of digits (50).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3313038481 + 415752100 = 57559^2 + 20390^2 .

It is a cyclic number.

It is not a de Polignac number, because 3728790581 - 2⁶ = 3728790517 is a prime.

It is a super-2 number, since 2×3728790581² = 27807758393908635122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3728790511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1864395290 + 1864395291.

It is an arithmetic number, because the mean of its divisors is an integer number (1864395291).

Almost surely, 2^3728790581 is an apocalyptic number.

It is an amenable number.

3728790581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3728790581 is an equidigital number, since it uses as much as digits as its factorization.

3728790581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 3728790581 is about 61063.8238321185. The cubic root of 3728790581 is about 1550.6817092889.

The spelling of 3728790581 in words is "three billion, seven hundred twenty-eight million, seven hundred ninety thousand, five hundred eighty-one".