628891132 has 24 divisors (see below), whose sum is σ = 1172740464. Its totient is φ = 294058752.

The previous prime is 628891121. The next prime is 628891147. The reversal of 628891132 is 231198826.

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, 18778 + ... + 40129.

It is an arithmetic number, because the mean of its divisors is an integer number (48864186).

Almost surely, 2^628891132 is an apocalyptic number.

It is an amenable number.

628891132 is a deficient number, since it is larger than the sum of its proper divisors (543849332).

628891132 is a wasteful number, since it uses less digits than its factorization.

628891132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59085 (or 59083 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 628891132 is about 25077.7018883310. The cubic root of 628891132 is about 856.7586350381.

The spelling of 628891132 in words is "six hundred twenty-eight million, eight hundred ninety-one thousand, one hundred thirty-two".