628274218 has 16 divisors (see below), whose sum is σ = 1107169056. Its totient is φ = 263611440.

The previous prime is 628274189. The next prime is 628274221. The reversal of 628274218 is 812472826.

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, 1098096 + ... + 1098667.

It is an arithmetic number, because the mean of its divisors is an integer number (69198066).

Almost surely, 2^628274218 is an apocalyptic number.

628274218 is a deficient number, since it is larger than the sum of its proper divisors (478894838).

628274218 is a wasteful number, since it uses less digits than its factorization.

628274218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196789.

The product of its digits is 86016, while the sum is 40.

The square root of 628274218 is about 25065.3988198871. The cubic root of 628274218 is about 856.4783961166.

The spelling of 628274218 in words is "six hundred twenty-eight million, two hundred seventy-four thousand, two hundred eighteen".