628440007 has 8 divisors (see below), whose sum is σ = 677474336. Its totient is φ = 579504672.

The previous prime is 628439993. The next prime is 628440013. The reversal of 628440007 is 700044826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 628440007 - 2¹¹ = 628437959 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 (628440077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11283 + ... + 37204.

It is an arithmetic number, because the mean of its divisors is an integer number (84684292).

Almost surely, 2^628440007 is an apocalyptic number.

628440007 is a deficient number, since it is larger than the sum of its proper divisors (49034329).

628440007 is a wasteful number, since it uses less digits than its factorization.

628440007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49497.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 628440007 is about 25068.7057304521. The cubic root of 628440007 is about 856.5537253305.

The spelling of 628440007 in words is "six hundred twenty-eight million, four hundred forty thousand, seven".