81469442 has 8 divisors (see below), whose sum is σ = 124275600. Its totient is φ = 40044244.

The previous prime is 81469441. The next prime is 81469459. The reversal of 81469442 is 24496418.

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

It is a junction number, because it is equal to n+sod(n) for n = 81469396 and 81469405.

It is not an unprimeable number, because it can be changed into a prime (81469441) 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, 345092 + ... + 345327.

It is an arithmetic number, because the mean of its divisors is an integer number (15534450).

Almost surely, 2^81469442 is an apocalyptic number.

81469442 is a deficient number, since it is larger than the sum of its proper divisors (42806158).

81469442 is a wasteful number, since it uses less digits than its factorization.

81469442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690480.

The product of its digits is 55296, while the sum is 38.

The square root of 81469442 is about 9026.0424328717. The cubic root of 81469442 is about 433.5091288048.

The spelling of 81469442 in words is "eighty-one million, four hundred sixty-nine thousand, four hundred forty-two".