628613215 has 4 divisors (see below), whose sum is σ = 754335864. Its totient is φ = 502890568.

The previous prime is 628613213. The next prime is 628613243. The reversal of 628613215 is 512316826.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628613215 - 2¹ = 628613213 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 (628613213) 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, 62861317 + ... + 62861326.

It is an arithmetic number, because the mean of its divisors is an integer number (188583966).

Almost surely, 2^628613215 is an apocalyptic number.

628613215 is a deficient number, since it is larger than the sum of its proper divisors (125722649).

628613215 is a wasteful number, since it uses less digits than its factorization.

628613215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125722648.

The product of its digits is 17280, while the sum is 34.

The square root of 628613215 is about 25072.1601582313. The cubic root of 628613215 is about 856.6324113508.

The spelling of 628613215 in words is "six hundred twenty-eight million, six hundred thirteen thousand, two hundred fifteen".