728072278 has 4 divisors (see below), whose sum is σ = 1092108420. Its totient is φ = 364036138.

The previous prime is 728072249. The next prime is 728072287. The reversal of 728072278 is 872270827.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182018068 + ... + 182018071.

It is an arithmetic number, because the mean of its divisors is an integer number (273027105).

Almost surely, 2^728072278 is an apocalyptic number.

728072278 is a deficient number, since it is larger than the sum of its proper divisors (364036142).

728072278 is a wasteful number, since it uses less digits than its factorization.

728072278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364036141.

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 728072278 is about 26982.8144936736. The cubic root of 728072278 is about 899.6180593347.

The spelling of 728072278 in words is "seven hundred twenty-eight million, seventy-two thousand, two hundred seventy-eight".