628400492020 has 48 divisors (see below), whose sum is σ = 1508208000768. Its totient is φ = 215444908800.

The previous prime is 628400491981. The next prime is 628400492047. The reversal of 628400492020 is 20294004826.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7032744 + ... + 7121536.

It is an arithmetic number, because the mean of its divisors is an integer number (31421000016).

Almost surely, 2^628400492020 is an apocalyptic number.

It is an amenable number.

628400492020 is an abundant number, since it is smaller than the sum of its proper divisors (879807508748).

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

628400492020 is a wasteful number, since it uses less digits than its factorization.

628400492020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139360 (or 139358 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

Adding to 628400492020 its reverse (20294004826), we get a palindrome (648694496846).

The spelling of 628400492020 in words is "six hundred twenty-eight billion, four hundred million, four hundred ninety-two thousand, twenty".