628443836 has 6 divisors (see below), whose sum is σ = 1099776720. Its totient is φ = 314221916.

The previous prime is 628443821. The next prime is 628443847. The reversal of 628443836 is 638344826.

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, 78555476 + ... + 78555483.

It is an arithmetic number, because the mean of its divisors is an integer number (183296120).

Almost surely, 2^628443836 is an apocalyptic number.

It is an amenable number.

628443836 is a deficient number, since it is larger than the sum of its proper divisors (471332884).

628443836 is a wasteful number, since it uses less digits than its factorization.

628443836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157110963 (or 157110961 counting only the distinct ones).

The product of its digits is 663552, while the sum is 44.

The square root of 628443836 is about 25068.7821004531. The cubic root of 628443836 is about 856.5554649490. Note that the first 3 decimals are identical.

The spelling of 628443836 in words is "six hundred twenty-eight million, four hundred forty-three thousand, eight hundred thirty-six".