81124848 has 160 divisors (see below), whose sum is σ = 269427200. Its totient is φ = 22892544.

The previous prime is 81124843. The next prime is 81124859. The reversal of 81124848 is 84842118.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81124843) 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, 420240 + ... + 420432.

It is an arithmetic number, because the mean of its divisors is an integer number (1683920).

Almost surely, 2^81124848 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 81124848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134713600).

81124848 is an abundant number, since it is smaller than the sum of its proper divisors (188302352).

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

81124848 is a wasteful number, since it uses less digits than its factorization.

81124848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 344 counting only the distinct ones).

The product of its digits is 16384, while the sum is 36.

The square root of 81124848 is about 9006.9333293858. The cubic root of 81124848 is about 432.8970557115.

The spelling of 81124848 in words is "eighty-one million, one hundred twenty-four thousand, eight hundred forty-eight".