628776403 has 4 divisors (see below), whose sum is σ = 628839288. Its totient is φ = 628713520.

The previous prime is 628776383. The next prime is 628776431. The reversal of 628776403 is 304677826.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 628776403 - 2¹³ = 628768211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 628776403.

It is not an unprimeable number, because it can be changed into a prime (628776493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12733 + ... + 37678.

It is an arithmetic number, because the mean of its divisors is an integer number (157209822).

Almost surely, 2^628776403 is an apocalyptic number.

628776403 is a deficient number, since it is larger than the sum of its proper divisors (62885).

628776403 is a wasteful number, since it uses less digits than its factorization.

628776403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62884.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 628776403 is about 25075.4143136260. The cubic root of 628776403 is about 856.7065321995.

The spelling of 628776403 in words is "six hundred twenty-eight million, seven hundred seventy-six thousand, four hundred three".