81750348 has 108 divisors (see below), whose sum is σ = 227714760. Its totient is φ = 24641280.

The previous prime is 81750313. The next prime is 81750359. The reversal of 81750348 is 84305718.

It is a super-2 number, since 2×81750348² = 13366238796242208, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 588063 + ... + 588201.

It is an arithmetic number, because the mean of its divisors is an integer number (2108470).

Almost surely, 2^81750348 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 81750348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113857380).

81750348 is an abundant number, since it is smaller than the sum of its proper divisors (145964412).

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

81750348 is a wasteful number, since it uses less digits than its factorization.

81750348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 81750348 is about 9041.5899044361. The cubic root of 81750348 is about 434.0068026145.

The spelling of 81750348 in words is "eighty-one million, seven hundred fifty thousand, three hundred forty-eight".