628620032 has 18 divisors (see below), whose sum is σ = 1254785028. Its totient is φ = 314309888.

The previous prime is 628620029. The next prime is 628620049. The reversal of 628620032 is 230026826.

It is a junction number, because it is equal to n+sod(n) for n = 628619977 and 628620004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1227518 + ... + 1228029.

Almost surely, 2^628620032 is an apocalyptic number.

It is an amenable number.

628620032 is a deficient number, since it is larger than the sum of its proper divisors (626164996).

628620032 is an equidigital number, since it uses as much as digits as its factorization.

628620032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455563 (or 2455549 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 628620032 is about 25072.2961054627. The cubic root of 628620032 is about 856.6355079248.

Adding to 628620032 its reverse (230026826), we get a palindrome (858646858).

The spelling of 628620032 in words is "six hundred twenty-eight million, six hundred twenty thousand, thirty-two".