81437048 has 64 divisors (see below), whose sum is σ = 193086720. Its totient is φ = 31276800.

The previous prime is 81437039. The next prime is 81437063. The reversal of 81437048 is 84073418.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81436999 and 81437017.

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 15 ways as a sum of consecutive naturals, for example, 44063 + ... + 45873.

It is an arithmetic number, because the mean of its divisors is an integer number (3016980).

Almost surely, 2^81437048 is an apocalyptic number.

81437048 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 81437048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96543360).

81437048 is an abundant number, since it is smaller than the sum of its proper divisors (111649672).

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

81437048 is a wasteful number, since it uses less digits than its factorization.

81437048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1904 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 81437048 is about 9024.2477802862. The cubic root of 81437048 is about 433.4516636741.

It can be divided in two parts, 814370 and 48, that added together give a palindrome (814418).

The spelling of 81437048 in words is "eighty-one million, four hundred thirty-seven thousand, forty-eight".