81416748 has 96 divisors (see below), whose sum is σ = 230809600. Its totient is φ = 21819456.

The previous prime is 81416747. The next prime is 81416813. The reversal of 81416748 is 84761418.

It is not an unprimeable number, because it can be changed into a prime (81416743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221661 + ... + 222027.

Almost surely, 2^81416748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81416748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115404800).

81416748 is an abundant number, since it is smaller than the sum of its proper divisors (149392852).

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

81416748 is a wasteful number, since it uses less digits than its factorization.

81416748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 537 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 81416748 is about 9023.1229626998. The cubic root of 81416748 is about 433.4156448505.

The spelling of 81416748 in words is "eighty-one million, four hundred sixteen thousand, seven hundred forty-eight".