628944039 has 24 divisors (see below), whose sum is σ = 950463072. Its totient is φ = 400012800.

The previous prime is 628943981. The next prime is 628944047. The reversal of 628944039 is 930449826.

It is not a de Polignac number, because 628944039 - 2¹⁷ = 628812967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 628943985 and 628944003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628944839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79219 + ... + 86795.

It is an arithmetic number, because the mean of its divisors is an integer number (39602628).

Almost surely, 2^628944039 is an apocalyptic number.

628944039 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

628944039 is a deficient number, since it is larger than the sum of its proper divisors (321519033).

628944039 is a wasteful number, since it uses less digits than its factorization.

628944039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8007 (or 8004 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 628944039 is about 25078.7567275573. The cubic root of 628944039 is about 856.7826600008.

The spelling of 628944039 in words is "six hundred twenty-eight million, nine hundred forty-four thousand, thirty-nine".