81702960 has 40 divisors (see below), whose sum is σ = 253279920. Its totient is φ = 21787392.

The previous prime is 81702931. The next prime is 81702991. The reversal of 81702960 is 6920718.

It is a tau number, because it is divible by the number of its divisors (40).

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, 169975 + ... + 170454.

It is an arithmetic number, because the mean of its divisors is an integer number (6331998).

Almost surely, 2^81702960 is an apocalyptic number.

81702960 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81702960 is an abundant number, since it is smaller than the sum of its proper divisors (171576960).

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

81702960 is a wasteful number, since it uses less digits than its factorization.

81702960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340445 (or 340439 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 81702960 is about 9038.9689677529. The cubic root of 81702960 is about 433.9229265613.

The spelling of 81702960 in words is "eighty-one million, seven hundred two thousand, nine hundred sixty".