428604019 has 4 divisors (see below), whose sum is σ = 428955696. Its totient is φ = 428252344.

The previous prime is 428603977. The next prime is 428604053. The reversal of 428604019 is 910406824.

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

It is a cyclic number.

It is not a de Polignac number, because 428604019 - 2¹⁹ = 428079731 is a prime.

It is a super-2 number, since 2×428604019² = 367402810205904722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428604619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174004 + ... + 176449.

It is an arithmetic number, because the mean of its divisors is an integer number (107238924).

Almost surely, 2^428604019 is an apocalyptic number.

428604019 is a deficient number, since it is larger than the sum of its proper divisors (351677).

428604019 is a wasteful number, since it uses less digits than its factorization.

428604019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351676.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 428604019 is about 20702.7538989382. The cubic root of 428604019 is about 753.9665517883.

The spelling of 428604019 in words is "four hundred twenty-eight million, six hundred four thousand, nineteen".