81469432 has 16 divisors (see below), whose sum is σ = 166642200. Its totient is φ = 37031520.

The previous prime is 81469411. The next prime is 81469433. The reversal of 81469432 is 23496418.

It is a junction number, because it is equal to n+sod(n) for n = 81469391 and 81469400.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462807 + ... + 462982.

Almost surely, 2^81469432 is an apocalyptic number.

It is an amenable number.

81469432 is an abundant number, since it is smaller than the sum of its proper divisors (85172768).

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

81469432 is a wasteful number, since it uses less digits than its factorization.

81469432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925806 (or 925802 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 81469432 is about 9026.0418789190. The cubic root of 81469432 is about 433.5091110677.

It can be divided in two parts, 814694 and 32, that added together give a triangular number (814726 = T₁₂₇₆).

The spelling of 81469432 in words is "eighty-one million, four hundred sixty-nine thousand, four hundred thirty-two".