628577772 has 24 divisors (see below), whose sum is σ = 1468486656. Its totient is φ = 209268048.

The previous prime is 628577743. The next prime is 628577773. The reversal of 628577772 is 277775826.

It is a happy number.

It is a super-2 number, since 2×628577772² = 790220030904967968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (628577773) 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, 21948 + ... + 41699.

It is an arithmetic number, because the mean of its divisors is an integer number (61186944).

Almost surely, 2^628577772 is an apocalyptic number.

It is an amenable number.

628577772 is an abundant number, since it is smaller than the sum of its proper divisors (839908884).

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

628577772 is a wasteful number, since it uses less digits than its factorization.

628577772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64477 (or 64475 counting only the distinct ones).

The product of its digits is 2304960, while the sum is 51.

The square root of 628577772 is about 25071.4533284371. The cubic root of 628577772 is about 856.6163112580.

The spelling of 628577772 in words is "six hundred twenty-eight million, five hundred seventy-seven thousand, seven hundred seventy-two".