72447278 has 8 divisors (see below), whose sum is σ = 112418280. Its totient is φ = 34974520.

The previous prime is 72447269. The next prime is 72447283. The reversal of 72447278 is 87274427.

It is a sphenic number, since it is the product of 3 distinct 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 in 3 ways as a sum of consecutive naturals, for example, 624488 + ... + 624603.

It is an arithmetic number, because the mean of its divisors is an integer number (14052285).

Almost surely, 2^72447278 is an apocalyptic number.

72447278 is a deficient number, since it is larger than the sum of its proper divisors (39971002).

72447278 is a wasteful number, since it uses less digits than its factorization.

72447278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249122.

The product of its digits is 175616, while the sum is 41.

The square root of 72447278 is about 8511.5966774748. The cubic root of 72447278 is about 416.8764459025.

The spelling of 72447278 in words is "seventy-two million, four hundred forty-seven thousand, two hundred seventy-eight".