628339390 has 16 divisors (see below), whose sum is σ = 1292584032. Its totient is φ = 215430624.

The previous prime is 628339343. The next prime is 628339399. The reversal of 628339390 is 93933826.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628339399) 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, 4488069 + ... + 4488208.

It is an arithmetic number, because the mean of its divisors is an integer number (80786502).

Almost surely, 2^628339390 is an apocalyptic number.

628339390 is an abundant number, since it is smaller than the sum of its proper divisors (664244642).

628339390 is a wasteful number, since it uses less digits than its factorization.

628339390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8976291.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 628339390 is about 25066.6988253340. The cubic root of 628339390 is about 856.5080097675.

The spelling of 628339390 in words is "six hundred twenty-eight million, three hundred thirty-nine thousand, three hundred ninety".