3730028581 has 4 divisors (see below), whose sum is σ = 3730719564. Its totient is φ = 3729337600.

The previous prime is 3730028527. The next prime is 3730028597. The reversal of 3730028581 is 1858200373.

3730028581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1858200373 = 127 ⋅14631499.

It can be written as a sum of positive squares in 2 ways, for example, as 3018953025 + 711075556 = 54945^2 + 26666^2 .

It is a cyclic number.

It is not a de Polignac number, because 3730028581 - 2¹⁹ = 3729504293 is a prime.

It is a super-2 number, since 2×3730028581² = 27826226430153747122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3730028581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3730028521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337330 + ... + 348211.

It is an arithmetic number, because the mean of its divisors is an integer number (932679891).

Almost surely, 2^3730028581 is an apocalyptic number.

It is an amenable number.

3730028581 is a deficient number, since it is larger than the sum of its proper divisors (690983).

3730028581 is an equidigital number, since it uses as much as digits as its factorization.

3730028581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690982.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 3730028581 is about 61073.9599256508. The cubic root of 3730028581 is about 1550.8533048322.

The spelling of 3730028581 in words is "three billion, seven hundred thirty million, twenty-eight thousand, five hundred eighty-one".