628650244 has 6 divisors (see below), whose sum is σ = 1100137934. Its totient is φ = 314325120.

The previous prime is 628650227. The next prime is 628650277. The reversal of 628650244 is 442056826.

It can be written as a sum of positive squares in only one way, i.e., 591073344 + 37576900 = 24312^2 + 6130^2 .

It is a super-2 number, since 2×628650244² = 790402258562519072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78581277 + ... + 78581284.

Almost surely, 2^628650244 is an apocalyptic number.

It is an amenable number.

628650244 is a deficient number, since it is larger than the sum of its proper divisors (471487690).

628650244 is a wasteful number, since it uses less digits than its factorization.

628650244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157162565 (or 157162563 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 628650244 is about 25072.8985958943. The cubic root of 628650244 is about 856.6492312426.

The spelling of 628650244 in words is "six hundred twenty-eight million, six hundred fifty thousand, two hundred forty-four".