628331951 has 48 divisors (see below), whose sum is σ = 763324800. Its totient is φ = 513257472.

The previous prime is 628331939. The next prime is 628331971. The reversal of 628331951 is 159133826.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-628331951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628331971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7953530 + ... + 7953608.

It is an arithmetic number, because the mean of its divisors is an integer number (15902600).

Almost surely, 2^628331951 is an apocalyptic number.

628331951 is a deficient number, since it is larger than the sum of its proper divisors (134992849).

628331951 is a wasteful number, since it uses less digits than its factorization.

628331951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 211 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 628331951 is about 25066.5504407766. The cubic root of 628331951 is about 856.5046296472.

The spelling of 628331951 in words is "six hundred twenty-eight million, three hundred thirty-one thousand, nine hundred fifty-one".