81360948 has 48 divisors (see below), whose sum is σ = 195197184. Its totient is φ = 26363520.

The previous prime is 81360947. The next prime is 81360949. The reversal of 81360948 is 84906318.

It is an interprime number because it is at equal distance from previous prime (81360947) and next prime (81360949).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81360943) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 101686 + ... + 102482.

It is an arithmetic number, because the mean of its divisors is an integer number (4066608).

Almost surely, 2^81360948 is an apocalyptic number.

It is an amenable number.

81360948 is an abundant number, since it is smaller than the sum of its proper divisors (113836236).

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

81360948 is a wasteful number, since it uses less digits than its factorization.

81360948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 81360948 is about 9020.0303768890. The cubic root of 81360948 is about 433.3166065864.

Adding to 81360948 its product of nonzero digits (41472), we get a triangular number (81402420 = T₁₂₇₅₉).

The spelling of 81360948 in words is "eighty-one million, three hundred sixty thousand, nine hundred forty-eight".