81472080 has 40 divisors (see below), whose sum is σ = 252564192. Its totient is φ = 21725824.

The previous prime is 81472063. The next prime is 81472087. The reversal of 81472080 is 8027418.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81472087) 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, 169494 + ... + 169973.

Almost surely, 2^81472080 is an apocalyptic number.

81472080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81472080 is an abundant number, since it is smaller than the sum of its proper divisors (171092112).

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

81472080 is a wasteful number, since it uses less digits than its factorization.

81472080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339483 (or 339477 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 81472080 is about 9026.1885643942. The cubic root of 81472080 is about 433.5138077974.

Adding to 81472080 its reverse (8027418), we get a palindrome (89499498).

The spelling of 81472080 in words is "eighty-one million, four hundred seventy-two thousand, eighty".