81295416 has 24 divisors (see below), whose sum is σ = 220175280. Its totient is φ = 27098448.

The previous prime is 81295387. The next prime is 81295427. The reversal of 81295416 is 61459218.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×81295416² = 13217889325226112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564480 + ... + 564623.

It is an arithmetic number, because the mean of its divisors is an integer number (9173970).

Almost surely, 2^81295416 is an apocalyptic number.

It is an amenable number.

81295416 is an abundant number, since it is smaller than the sum of its proper divisors (138879864).

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

81295416 is a wasteful number, since it uses less digits than its factorization.

81295416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129115 (or 1129108 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 81295416 is about 9016.3970631289. The cubic root of 81295416 is about 433.2002373625.

The spelling of 81295416 in words is "eighty-one million, two hundred ninety-five thousand, four hundred sixteen".