628132249 has 4 divisors (see below), whose sum is σ = 628188880. Its totient is φ = 628075620.

The previous prime is 628132247. The next prime is 628132283. The reversal of 628132249 is 942231826.

628132249 = T₂₀₄₆₂ + T₂₀₄₆₃ + T₂₀₄₆₄.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 942231826 = 2 ⋅471115913.

It is a cyclic number.

It is not a de Polignac number, because 628132249 - 2¹ = 628132247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628132247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5607 + ... + 35884.

It is an arithmetic number, because the mean of its divisors is an integer number (157047220).

Almost surely, 2^628132249 is an apocalyptic number.

628132249 is the 20464-th centered triangular number.

It is an amenable number.

628132249 is a deficient number, since it is larger than the sum of its proper divisors (56631).

628132249 is a wasteful number, since it uses less digits than its factorization.

628132249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56630.

The product of its digits is 41472, while the sum is 37.

The square root of 628132249 is about 25062.5666881906. The cubic root of 628132249 is about 856.4138794148.

The spelling of 628132249 in words is "six hundred twenty-eight million, one hundred thirty-two thousand, two hundred forty-nine".