81962244 has 144 divisors (see below), whose sum is σ = 258306048. Its totient is φ = 21337344.

The previous prime is 81962227. The next prime is 81962261. The reversal of 81962244 is 44226918.

It is an interprime number because it is at equal distance from previous prime (81962227) and next prime (81962261).

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

It is a junction number, because it is equal to n+sod(n) for n = 81962199 and 81962208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 415954 + ... + 416150.

It is an arithmetic number, because the mean of its divisors is an integer number (1793792).

Almost surely, 2^81962244 is an apocalyptic number.

81962244 is a gapful number since it is divisible by the number (84) 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 81962244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129153024).

81962244 is an abundant number, since it is smaller than the sum of its proper divisors (176343804).

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

81962244 is a wasteful number, since it uses less digits than its factorization.

81962244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 349 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 81962244 is about 9053.3001717606. The cubic root of 81962244 is about 434.3814593798.

It can be divided in two parts, 8196 and 2244, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 81962244 in words is "eighty-one million, nine hundred sixty-two thousand, two hundred forty-four".