81627936 has 48 divisors (see below), whose sum is σ = 230759424. Its totient is φ = 25115904.

The previous prime is 81627913. The next prime is 81627937. The reversal of 81627936 is 63972618.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (81627937) 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, 31456 + ... + 33951.

It is an arithmetic number, because the mean of its divisors is an integer number (4807488).

Almost surely, 2^81627936 is an apocalyptic number.

It is an amenable number.

81627936 is an abundant number, since it is smaller than the sum of its proper divisors (149131488).

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

81627936 is a wasteful number, since it uses less digits than its factorization.

81627936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65433 (or 65425 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 81627936 is about 9034.8179837781. The cubic root of 81627936 is about 433.7900688567.

The spelling of 81627936 in words is "eighty-one million, six hundred twenty-seven thousand, nine hundred thirty-six".