628849269 has 12 divisors (see below), whose sum is σ = 908640876. Its totient is φ = 419092992.

The previous prime is 628849241. The next prime is 628849271. The reversal of 628849269 is 962948826.

It is a happy number.

628849269 is a `hidden beast` number, since 628 + 8 + 4 + 9 + 2 + 6 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 410548644 + 218300625 = 20262^2 + 14775^2 .

It is not a de Polignac number, because 628849269 - 2¹³ = 628841077 is a prime.

It is a super-2 number, since 2×628849269² = 790902806243668722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628849469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21909 + ... + 41685.

It is an arithmetic number, because the mean of its divisors is an integer number (75720073).

Almost surely, 2^628849269 is an apocalyptic number.

It is an amenable number.

628849269 is a deficient number, since it is larger than the sum of its proper divisors (279791607).

628849269 is a wasteful number, since it uses less digits than its factorization.

628849269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23316 (or 23313 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 628849269 is about 25076.8672086447. The cubic root of 628849269 is about 856.7396241787.

The spelling of 628849269 in words is "six hundred twenty-eight million, eight hundred forty-nine thousand, two hundred sixty-nine".