628402671720 has 48 divisors (see below), whose sum is σ = 2042308684260. Its totient is φ = 167574045696.

The previous prime is 628402671709. The next prime is 628402671769. The reversal of 628402671720 is 27176204826.

It is a happy number.

628402671720 is a `hidden beast` number, since 628 + 4 + 0 + 2 + 6 + 7 + 17 + 2 + 0 = 666.

628402671720 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 623742971076 + 4659700644 = 789774^2 + 68262^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 872781129 + ... + 872781848.

Almost surely, 2^628402671720 is an apocalyptic number.

628402671720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

628402671720 is an abundant number, since it is smaller than the sum of its proper divisors (1413906012540).

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

628402671720 is a wasteful number, since it uses less digits than its factorization.

628402671720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745562994 (or 1745562987 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 628402671720 in words is "six hundred twenty-eight billion, four hundred two million, six hundred seventy-one thousand, seven hundred twenty".