628887424 has 64 divisors (see below), whose sum is σ = 1372042800. Its totient is φ = 284753920.

The previous prime is 628887379. The next prime is 628887437. The reversal of 628887424 is 424788826.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445632 + ... + 447040.

Almost surely, 2^628887424 is an apocalyptic number.

628887424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628887424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686021400).

628887424 is an abundant number, since it is smaller than the sum of its proper divisors (743155376).

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

628887424 is a wasteful number, since it uses less digits than its factorization.

628887424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751 (or 1739 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 49.

The square root of 628887424 is about 25077.6279580027. The cubic root of 628887424 is about 856.7569511922.

The spelling of 628887424 in words is "six hundred twenty-eight million, eight hundred eighty-seven thousand, four hundred twenty-four".