628739001 has 12 divisors (see below), whose sum is σ = 990740400. Its totient is φ = 381053880.

The previous prime is 628738997. The next prime is 628739011. The reversal of 628739001 is 100937826.

It is not a de Polignac number, because 628739001 - 2² = 628738997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (628739011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3175351 + ... + 3175548.

It is an arithmetic number, because the mean of its divisors is an integer number (82561700).

Almost surely, 2^628739001 is an apocalyptic number.

It is an amenable number.

628739001 is a deficient number, since it is larger than the sum of its proper divisors (362001399).

628739001 is a wasteful number, since it uses less digits than its factorization.

628739001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6350916 (or 6350913 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 628739001 is about 25074.6685122655. The cubic root of 628739001 is about 856.6895451471.

The spelling of 628739001 in words is "six hundred twenty-eight million, seven hundred thirty-nine thousand, one".