628201394 has 4 divisors (see below), whose sum is σ = 942302094. Its totient is φ = 314100696.

The previous prime is 628201381. The next prime is 628201403. The reversal of 628201394 is 493102826.

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

It can be written as a sum of positive squares in only one way, i.e., 527299369 + 100902025 = 22963^2 + 10045^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157050347 + ... + 157050350.

Almost surely, 2^628201394 is an apocalyptic number.

628201394 is a deficient number, since it is larger than the sum of its proper divisors (314100700).

628201394 is a wasteful number, since it uses less digits than its factorization.

628201394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314100699.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 628201394 is about 25063.9460979312. The cubic root of 628201394 is about 856.4453030335.

The spelling of 628201394 in words is "six hundred twenty-eight million, two hundred one thousand, three hundred ninety-four".