722145878 has 8 divisors (see below), whose sum is σ = 1120571280. Its totient is φ = 348622120.

The previous prime is 722145869. The next prime is 722145883. The reversal of 722145878 is 878541227.

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

It is a super-2 number, since 2×722145878² = 1042989338224781768, which contains 22 as substring.

It is a Curzon number.

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, 6225338 + ... + 6225453.

It is an arithmetic number, because the mean of its divisors is an integer number (140071410).

Almost surely, 2^722145878 is an apocalyptic number.

722145878 is a deficient number, since it is larger than the sum of its proper divisors (398425402).

722145878 is a wasteful number, since it uses less digits than its factorization.

722145878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12450822.

The product of its digits is 250880, while the sum is 44.

The square root of 722145878 is about 26872.7720564887. The cubic root of 722145878 is about 897.1704872713.

The spelling of 722145878 in words is "seven hundred twenty-two million, one hundred forty-five thousand, eight hundred seventy-eight".