81462336 has 56 divisors (see below), whose sum is σ = 216347040. Its totient is φ = 27052032.

The previous prime is 81462331. The next prime is 81462341. The reversal of 81462336 is 63326418.

It is an interprime number because it is at equal distance from previous prime (81462331) and next prime (81462341).

It is a super-2 number, since 2×81462336² = 13272224373153792, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 81462297 and 81462306.

It is not an unprimeable number, because it can be changed into a prime (81462331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64075 + ... + 65333.

It is an arithmetic number, because the mean of its divisors is an integer number (3863340).

Almost surely, 2^81462336 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 81462336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108173520).

81462336 is an abundant number, since it is smaller than the sum of its proper divisors (134884704).

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

81462336 is a wasteful number, since it uses less digits than its factorization.

81462336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611 (or 1601 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 81462336 is about 9025.6487855444. The cubic root of 81462336 is about 433.4965244656.

The spelling of 81462336 in words is "eighty-one million, four hundred sixty-two thousand, three hundred thirty-six".