428974191 has 32 divisors (see below), whose sum is σ = 680352000. Its totient is φ = 266320224.

The previous prime is 428974121. The next prime is 428974193. The reversal of 428974191 is 191479824.

It is a happy number.

It is not a de Polignac number, because 428974191 - 2¹¹ = 428972143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428974193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23181 + ... + 37353.

It is an arithmetic number, because the mean of its divisors is an integer number (21261000).

Almost surely, 2^428974191 is an apocalyptic number.

428974191 is a deficient number, since it is larger than the sum of its proper divisors (251377809).

428974191 is a wasteful number, since it uses less digits than its factorization.

428974191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14260 (or 14254 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 428974191 is about 20711.6921327061. The cubic root of 428974191 is about 754.1835485058.

The spelling of 428974191 in words is "four hundred twenty-eight million, nine hundred seventy-four thousand, one hundred ninety-one".