81469434 has 32 divisors (see below), whose sum is σ = 168315840. Its totient is φ = 26272512.

The previous prime is 81469433. The next prime is 81469441. The reversal of 81469434 is 43496418.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81469392 and 81469401.

It is not an unprimeable number, because it can be changed into a prime (81469433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26674 + ... + 29570.

It is an arithmetic number, because the mean of its divisors is an integer number (5259870).

Almost surely, 2^81469434 is an apocalyptic number.

81469434 is an abundant number, since it is smaller than the sum of its proper divisors (86846406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81469434 is a wasteful number, since it uses less digits than its factorization.

81469434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054.

The product of its digits is 82944, while the sum is 39.

The square root of 81469434 is about 9026.0419897096. The cubic root of 81469434 is about 433.5091146151.

The spelling of 81469434 in words is "eighty-one million, four hundred sixty-nine thousand, four hundred thirty-four".