628607540 has 48 divisors (see below), whose sum is σ = 1473595200. Its totient is φ = 223265280.

The previous prime is 628607489. The next prime is 628607557. The reversal of 628607540 is 45706826.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 628607494 and 628607503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23765 + ... + 42684.

It is an arithmetic number, because the mean of its divisors is an integer number (30699900).

Almost surely, 2^628607540 is an apocalyptic number.

It is an amenable number.

628607540 is an abundant number, since it is smaller than the sum of its proper divisors (844987660).

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

628607540 is a wasteful number, since it uses less digits than its factorization.

628607540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66512 (or 66510 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 628607540 is about 25072.0469846401. The cubic root of 628607540 is about 856.6298335051.

The spelling of 628607540 in words is "six hundred twenty-eight million, six hundred seven thousand, five hundred forty".