81460608 has 64 divisors (see below), whose sum is σ = 217398720. Its totient is φ = 27025920.

The previous prime is 81460607. The next prime is 81460633. The reversal of 81460608 is 80606418.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81460601) 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, 117543 + ... + 118233.

It is an arithmetic number, because the mean of its divisors is an integer number (3396855).

Almost surely, 2^81460608 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 81460608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108699360).

81460608 is an abundant number, since it is smaller than the sum of its proper divisors (135938112).

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

81460608 is a wasteful number, since it uses less digits than its factorization.

81460608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 1003 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 81460608 is about 9025.5530578464. The cubic root of 81460608 is about 433.4934592974.

The spelling of 81460608 in words is "eighty-one million, four hundred sixty thousand, six hundred eight".