416638081 has 4 divisors (see below), whose sum is σ = 416690500. Its totient is φ = 416585664.

The previous prime is 416638049. The next prime is 416638129. The reversal of 416638081 is 180836614.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198810000 + 217828081 = 14100^2 + 14759^2 .

It is a cyclic number.

It is not a de Polignac number, because 416638081 - 2⁵ = 416638049 is a prime.

It is a super-2 number, since 2×416638081² = 347174581078725122, 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 416638081.

It is not an unprimeable number, because it can be changed into a prime (416638181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11556 + ... + 31093.

It is an arithmetic number, because the mean of its divisors is an integer number (104172625).

Almost surely, 2^416638081 is an apocalyptic number.

It is an amenable number.

416638081 is a deficient number, since it is larger than the sum of its proper divisors (52419).

416638081 is an equidigital number, since it uses as much as digits as its factorization.

416638081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52418.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 416638081 is about 20411.7143082104. The cubic root of 416638081 is about 746.8837101766.

The spelling of 416638081 in words is "four hundred sixteen million, six hundred thirty-eight thousand, eighty-one".