628406215 has 8 divisors (see below), whose sum is σ = 770132160. Its totient is φ = 492028512.

The previous prime is 628406203. The next prime is 628406231. The reversal of 628406215 is 512604826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 628406215 - 2⁷ = 628406087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336800 + ... + 1337269.

It is an arithmetic number, because the mean of its divisors is an integer number (96266520).

Almost surely, 2^628406215 is an apocalyptic number.

628406215 is a deficient number, since it is larger than the sum of its proper divisors (141725945).

628406215 is a wasteful number, since it uses less digits than its factorization.

628406215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2674121.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 628406215 is about 25068.0317336643. The cubic root of 628406215 is about 856.5383724026.

The spelling of 628406215 in words is "six hundred twenty-eight million, four hundred six thousand, two hundred fifteen".