81250048 has 108 divisors (see below), whose sum is σ = 185403064. Its totient is φ = 35481600.

The previous prime is 81250033. The next prime is 81250049. The reversal of 81250048 is 84005218.

It is a junction number, because it is equal to n+sod(n) for n = 81249998 and 81250025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81250049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1331938 + ... + 1331998.

Almost surely, 2^81250048 is an apocalyptic number.

81250048 is a gapful number since it is divisible by the number (88) 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 81250048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92701532).

81250048 is an abundant number, since it is smaller than the sum of its proper divisors (104153016).

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

81250048 is a wasteful number, since it uses less digits than its factorization.

81250048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 81250048 is about 9013.8808512205. The cubic root of 81250048 is about 433.1196379617.

The spelling of 81250048 in words is "eighty-one million, two hundred fifty thousand, forty-eight".