81419632 has 40 divisors (see below), whose sum is σ = 188130816. Its totient is φ = 33375936.

The previous prime is 81419629. The next prime is 81419659. The reversal of 81419632 is 23691418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13228 + ... + 18379.

Almost surely, 2^81419632 is an apocalyptic number.

It is an amenable number.

81419632 is an abundant number, since it is smaller than the sum of its proper divisors (106711184).

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

81419632 is a wasteful number, since it uses less digits than its factorization.

81419632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31645 (or 31639 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 81419632 is about 9023.2827729159. The cubic root of 81419632 is about 433.4207623723.

The spelling of 81419632 in words is "eighty-one million, four hundred nineteen thousand, six hundred thirty-two".