81827426 has 8 divisors (see below), whose sum is σ = 129961260. Its totient is φ = 38507008.

The previous prime is 81827393. The next prime is 81827441. The reversal of 81827426 is 62472818.

It can be written as a sum of positive squares in 2 ways, for example, as 76300225 + 5527201 = 8735^2 + 2351^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 81827426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203311 + ... + 1203378.

Almost surely, 2^81827426 is an apocalyptic number.

81827426 is a deficient number, since it is larger than the sum of its proper divisors (48133834).

81827426 is a wasteful number, since it uses less digits than its factorization.

81827426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406708.

The product of its digits is 43008, while the sum is 38.

The square root of 81827426 is about 9045.8513142766. The cubic root of 81827426 is about 434.1431603148.

The spelling of 81827426 in words is "eighty-one million, eight hundred twenty-seven thousand, four hundred twenty-six".