81328294 has 8 divisors (see below), whose sum is σ = 125289648. Its totient is φ = 39565080.

The previous prime is 81328249. The next prime is 81328307. The reversal of 81328294 is 49282318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×81328294² = 13228582809900872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549442 + ... + 549589.

It is an arithmetic number, because the mean of its divisors is an integer number (15661206).

Almost surely, 2^81328294 is an apocalyptic number.

81328294 is a deficient number, since it is larger than the sum of its proper divisors (43961354).

81328294 is a wasteful number, since it uses less digits than its factorization.

81328294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099070.

The product of its digits is 27648, while the sum is 37.

The square root of 81328294 is about 9018.2201126386. The cubic root of 81328294 is about 433.2586286736.

The spelling of 81328294 in words is "eighty-one million, three hundred twenty-eight thousand, two hundred ninety-four".