729281822 has 4 divisors (see below), whose sum is σ = 1093922736. Its totient is φ = 364640910.

The previous prime is 729281797. The next prime is 729281837. The reversal of 729281822 is 228182927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 228182927 = 7 ⋅32597561.

It is a self number, because there is not a number n which added to its sum of digits gives 729281822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182320454 + ... + 182320457.

It is an arithmetic number, because the mean of its divisors is an integer number (273480684).

Almost surely, 2^729281822 is an apocalyptic number.

729281822 is a deficient number, since it is larger than the sum of its proper divisors (364640914).

729281822 is a wasteful number, since it uses less digits than its factorization.

729281822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364640913.

The product of its digits is 64512, while the sum is 41.

The square root of 729281822 is about 27005.2184216310. The cubic root of 729281822 is about 900.1159611899.

The spelling of 729281822 in words is "seven hundred twenty-nine million, two hundred eighty-one thousand, eight hundred twenty-two".