81423060 has 48 divisors (see below), whose sum is σ = 228384576. Its totient is φ = 21674752.

The previous prime is 81423053. The next prime is 81423071. The reversal of 81423060 is 6032418.

It is a happy number.

81423060 is nontrivially palindromic in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 81423060.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56104 + ... + 57536.

It is an arithmetic number, because the mean of its divisors is an integer number (4758012).

Almost surely, 2^81423060 is an apocalyptic number.

It is an amenable number.

81423060 is an abundant number, since it is smaller than the sum of its proper divisors (146961516).

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

81423060 is a wasteful number, since it uses less digits than its factorization.

81423060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392 (or 2390 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 81423060 is about 9023.4727239572. The cubic root of 81423060 is about 433.4268450393.

Adding to 81423060 its reverse (6032418), we get a palindrome (87455478).

The spelling of 81423060 in words is "eighty-one million, four hundred twenty-three thousand, sixty".