628213245 has 48 divisors (see below), whose sum is σ = 1163037120. Its totient is φ = 288541440.

The previous prime is 628213241. The next prime is 628213249. The reversal of 628213245 is 542312826.

It is an interprime number because it is at equal distance from previous prime (628213241) and next prime (628213249).

It is not a de Polignac number, because 628213245 - 2² = 628213241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628213241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25377 + ... + 43593.

It is an arithmetic number, because the mean of its divisors is an integer number (24229940).

Almost surely, 2^628213245 is an apocalyptic number.

It is an amenable number.

628213245 is a deficient number, since it is larger than the sum of its proper divisors (534823875).

628213245 is a wasteful number, since it uses less digits than its factorization.

628213245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18266 (or 18255 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 628213245 is about 25064.1825121028. The cubic root of 628213245 is about 856.4506886044.

It can be divided in two parts, 62821 and 3245, that added together give a palindrome (66066).

The spelling of 628213245 in words is "six hundred twenty-eight million, two hundred thirteen thousand, two hundred forty-five".