628746140 has 24 divisors (see below), whose sum is σ = 1440400752. Its totient is φ = 228634880.

The previous prime is 628746133. The next prime is 628746161. The reversal of 628746140 is 41647826.

It is a junction number, because it is equal to n+sod(n) for n = 628746094 and 628746103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1428749 + ... + 1429188.

It is an arithmetic number, because the mean of its divisors is an integer number (60016698).

Almost surely, 2^628746140 is an apocalyptic number.

It is an amenable number.

628746140 is an abundant number, since it is smaller than the sum of its proper divisors (811654612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628746140 is a wasteful number, since it uses less digits than its factorization.

628746140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857957 (or 2857955 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 628746140 is about 25074.8108666845. The cubic root of 628746140 is about 856.6927875543.

The spelling of 628746140 in words is "six hundred twenty-eight million, seven hundred forty-six thousand, one hundred forty".