428941994 has 16 divisors (see below), whose sum is σ = 733666248. Its totient is φ = 186327552.

The previous prime is 428941991. The next prime is 428942021. The reversal of 428941994 is 499149824.

It can be written as a sum of positive squares in 4 ways, for example, as 316306225 + 112635769 = 17785^2 + 10613^2 .

It is not an unprimeable number, because it can be changed into a prime (428941991) 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, 484787 + ... + 485670.

Almost surely, 2^428941994 is an apocalyptic number.

428941994 is a deficient number, since it is larger than the sum of its proper divisors (304724254).

428941994 is a wasteful number, since it uses less digits than its factorization.

428941994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970489.

The product of its digits is 746496, while the sum is 50.

The square root of 428941994 is about 20710.9148518360. The cubic root of 428941994 is about 754.1646794178.

The spelling of 428941994 in words is "four hundred twenty-eight million, nine hundred forty-one thousand, nine hundred ninety-four".