81418932 has 60 divisors (see below), whose sum is σ = 243258400. Its totient is φ = 23261904.

The previous prime is 81418913. The next prime is 81418937. The reversal of 81418932 is 23981418.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81418937) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15682 + ... + 20217.

Almost surely, 2^81418932 is an apocalyptic number.

It is an amenable number.

81418932 is an abundant number, since it is smaller than the sum of its proper divisors (161839468).

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

81418932 is a wasteful number, since it uses less digits than its factorization.

81418932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35922 (or 35911 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 81418932 is about 9023.2439842886. The cubic root of 81418932 is about 433.4195202665.

The spelling of 81418932 in words is "eighty-one million, four hundred eighteen thousand, nine hundred thirty-two".