628051304 has 8 divisors (see below), whose sum is σ = 1177596210. Its totient is φ = 314025648.

The previous prime is 628051301. The next prime is 628051309. The reversal of 628051304 is 403150826.

It can be written as a sum of positive squares in only one way, i.e., 394022500 + 234028804 = 19850^2 + 15298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×628051304² = 788896880912200832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (628051301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39253199 + ... + 39253214.

Almost surely, 2^628051304 is an apocalyptic number.

It is an amenable number.

628051304 is a deficient number, since it is larger than the sum of its proper divisors (549544906).

628051304 is a wasteful number, since it uses less digits than its factorization.

628051304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78506419 (or 78506415 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 628051304 is about 25060.9517776161. The cubic root of 628051304 is about 856.3770902409.

The spelling of 628051304 in words is "six hundred twenty-eight million, fifty-one thousand, three hundred four".