35728681 has 2 divisors, whose sum is σ = 35728682. Its totient is φ = 35728680.

The previous prime is 35728673. The next prime is 35728697. The reversal of 35728681 is 18682753.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35581225 + 147456 = 5965^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 35728681 - 2³ = 35728673 is a prime.

It is a super-2 number, since 2×35728681² = 2553077291999522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (35728631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17864340 + 17864341.

It is an arithmetic number, because the mean of its divisors is an integer number (17864341).

Almost surely, 2^35728681 is an apocalyptic number.

It is an amenable number.

35728681 is a deficient number, since it is larger than the sum of its proper divisors (1).

35728681 is an equidigital number, since it uses as much as digits as its factorization.

35728681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 35728681 is about 5977.3473213458. The cubic root of 35728681 is about 329.3611177593.

The spelling of 35728681 in words is "thirty-five million, seven hundred twenty-eight thousand, six hundred eighty-one".