628989938 has 16 divisors (see below), whose sum is σ = 997678080. Its totient is φ = 296925600.

The previous prime is 628989937. The next prime is 628989983. The reversal of 628989938 is 839989826.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is not an unprimeable number, because it can be changed into a prime (628989937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121178 + ... + 126261.

It is an arithmetic number, because the mean of its divisors is an integer number (62354880).

Almost surely, 2^628989938 is an apocalyptic number.

628989938 is a deficient number, since it is larger than the sum of its proper divisors (368688142).

628989938 is a wasteful number, since it uses less digits than its factorization.

628989938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247513.

The product of its digits is 13436928, while the sum is 62.

The square root of 628989938 is about 25079.6718080600. The cubic root of 628989938 is about 856.8035015533.

The spelling of 628989938 in words is "six hundred twenty-eight million, nine hundred eighty-nine thousand, nine hundred thirty-eight".