81470896 has 40 divisors (see below), whose sum is σ = 173964560. Its totient is φ = 36723456.

The previous prime is 81470863. The next prime is 81470903. The reversal of 81470896 is 69807418.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4390 + ... + 13498.

It is an arithmetic number, because the mean of its divisors is an integer number (4349114).

Almost surely, 2^81470896 is an apocalyptic number.

81470896 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81470896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86982280).

81470896 is an abundant number, since it is smaller than the sum of its proper divisors (92493664).

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

81470896 is a wasteful number, since it uses less digits than its factorization.

81470896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9173 (or 9167 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 81470896 is about 9026.1229772256. The cubic root of 81470896 is about 433.5117077617.

The spelling of 81470896 in words is "eighty-one million, four hundred seventy thousand, eight hundred ninety-six".