628815672 has 24 divisors (see below), whose sum is σ = 1703042640. Its totient is φ = 209605200.

The previous prime is 628815631. The next prime is 628815673. The reversal of 628815672 is 276518826.

628815672 is a `hidden beast` number, since 6 + 2 + 8 + 81 + 567 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×628815672³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628815673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4366704 + ... + 4366847.

It is an arithmetic number, because the mean of its divisors is an integer number (70960110).

Almost surely, 2^628815672 is an apocalyptic number.

It is an amenable number.

628815672 is an abundant number, since it is smaller than the sum of its proper divisors (1074226968).

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

628815672 is a wasteful number, since it uses less digits than its factorization.

628815672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8733563 (or 8733556 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 628815672 is about 25076.1973193704. The cubic root of 628815672 is about 856.7243664716.

The spelling of 628815672 in words is "six hundred twenty-eight million, eight hundred fifteen thousand, six hundred seventy-two".