81046856 has 32 divisors (see below), whose sum is σ = 174506400. Its totient is φ = 34899840.

The previous prime is 81046853. The next prime is 81046879. The reversal of 81046856 is 65864018.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (81046853) 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, 22565 + ... + 25908.

It is an arithmetic number, because the mean of its divisors is an integer number (5453325).

Almost surely, 2^81046856 is an apocalyptic number.

It is an amenable number.

81046856 is an abundant number, since it is smaller than the sum of its proper divisors (93459544).

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

81046856 is a wasteful number, since it uses less digits than its factorization.

81046856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48509 (or 48505 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 81046856 is about 9002.6027347651. The cubic root of 81046856 is about 432.7582846965.

The spelling of 81046856 in words is "eighty-one million, forty-six thousand, eight hundred fifty-six".