405698081 has 32 divisors (see below), whose sum is σ = 476720640. Its totient is φ = 342752256.

The previous prime is 405698017. The next prime is 405698141. The reversal of 405698081 is 180896504.

It is not a de Polignac number, because 405698081 - 2⁶ = 405698017 is a prime.

It is a super-2 number, since 2×405698081² = 329181865854165122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405698281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 419060 + ... + 420026.

It is an arithmetic number, because the mean of its divisors is an integer number (14897520).

Almost surely, 2^405698081 is an apocalyptic number.

It is an amenable number.

405698081 is a deficient number, since it is larger than the sum of its proper divisors (71022559).

405698081 is a wasteful number, since it uses less digits than its factorization.

405698081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 405698081 is about 20141.9482920595. The cubic root of 405698081 is about 740.2884686149.

The spelling of 405698081 in words is "four hundred five million, six hundred ninety-eight thousand, eighty-one".