81682276 has 24 divisors (see below), whose sum is σ = 155313144. Its totient is φ = 37363200.

The previous prime is 81682267. The next prime is 81682283. The reversal of 81682276 is 67228618.

It can be written as a sum of positive squares in 4 ways, for example, as 141376 + 81540900 = 376^2 + 9030^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1075 + ... + 12826.

It is an arithmetic number, because the mean of its divisors is an integer number (6471381).

Almost surely, 2^81682276 is an apocalyptic number.

It is an amenable number.

81682276 is a deficient number, since it is larger than the sum of its proper divisors (73630868).

81682276 is a wasteful number, since it uses less digits than its factorization.

81682276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14031 (or 14029 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 81682276 is about 9037.8247382874. The cubic root of 81682276 is about 433.8863060223.

It can be divided in two parts, 81 and 682276, that multiplied together give a square (55264356 = 7434²).

The spelling of 81682276 in words is "eighty-one million, six hundred eighty-two thousand, two hundred seventy-six".