628625940 has 96 divisors (see below), whose sum is σ = 1841785344. Its totient is φ = 160035840.

The previous prime is 628625939. The next prime is 628625993. The reversal of 628625940 is 49526826.

It is a junction number, because it is equal to n+sod(n) for n = 628625892 and 628625901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112902 + ... + 118338.

It is an arithmetic number, because the mean of its divisors is an integer number (19185264).

Almost surely, 2^628625940 is an apocalyptic number.

628625940 is a gapful number since it is divisible by the number (60) 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 628625940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (920892672).

628625940 is an abundant number, since it is smaller than the sum of its proper divisors (1213159404).

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

628625940 is a wasteful number, since it uses less digits than its factorization.

628625940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5537 (or 5535 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 628625940 is about 25072.4139244709. The cubic root of 628625940 is about 856.6381915739.

The spelling of 628625940 in words is "six hundred twenty-eight million, six hundred twenty-five thousand, nine hundred forty".