628775078 has 4 divisors (see below), whose sum is σ = 943162620. Its totient is φ = 314387538.

The previous prime is 628775051. The next prime is 628775087. The reversal of 628775078 is 870577826.

628775078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

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, 157193768 + ... + 157193771.

It is an arithmetic number, because the mean of its divisors is an integer number (235790655).

Almost surely, 2^628775078 is an apocalyptic number.

628775078 is a deficient number, since it is larger than the sum of its proper divisors (314387542).

628775078 is a wasteful number, since it uses less digits than its factorization.

628775078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314387541.

The product of its (nonzero) digits is 1317120, while the sum is 50.

The square root of 628775078 is about 25075.3878933108. The cubic root of 628775078 is about 856.7059304292.

The spelling of 628775078 in words is "six hundred twenty-eight million, seven hundred seventy-five thousand, seventy-eight".