628191914 has 16 divisors (see below), whose sum is σ = 1103167296. Its totient is φ = 262658400.

The previous prime is 628191901. The next prime is 628191919. The reversal of 628191914 is 419191826.

628191914 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (628191919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546632 + ... + 547779.

It is an arithmetic number, because the mean of its divisors is an integer number (68947956).

Almost surely, 2^628191914 is an apocalyptic number.

628191914 is a deficient number, since it is larger than the sum of its proper divisors (474975382).

628191914 is a wasteful number, since it uses less digits than its factorization.

628191914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094461.

The product of its digits is 31104, while the sum is 41.

The square root of 628191914 is about 25063.7569809476. The cubic root of 628191914 is about 856.4409948916.

The spelling of 628191914 in words is "six hundred twenty-eight million, one hundred ninety-one thousand, nine hundred fourteen".