81762896 has 20 divisors (see below), whose sum is σ = 162698292. Its totient is φ = 39776256.

The previous prime is 81762893. The next prime is 81762899. The reversal of 81762896 is 69826718.

It is an interprime number because it is at equal distance from previous prime (81762893) and next prime (81762899).

It can be written as a sum of positive squares in 2 ways, for example, as 53290000 + 28472896 = 7300^2 + 5336^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81762896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81762893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68465 + ... + 69648.

Almost surely, 2^81762896 is an apocalyptic number.

It is an amenable number.

81762896 is a deficient number, since it is larger than the sum of its proper divisors (80935396).

81762896 is a wasteful number, since it uses less digits than its factorization.

81762896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138158 (or 138152 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The square root of 81762896 is about 9042.2837823196. The cubic root of 81762896 is about 434.0290069593.

The spelling of 81762896 in words is "eighty-one million, seven hundred sixty-two thousand, eight hundred ninety-six".