428394919 has 8 divisors (see below), whose sum is σ = 459451440. Its totient is φ = 398189376.

The previous prime is 428394899. The next prime is 428394943. The reversal of 428394919 is 919493824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428394919 is a prime.

It is a super-2 number, since 2×428394919² = 367044413250033122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428394319) 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, 211702 + ... + 213715.

It is an arithmetic number, because the mean of its divisors is an integer number (57431430).

Almost surely, 2^428394919 is an apocalyptic number.

428394919 is a deficient number, since it is larger than the sum of its proper divisors (31056521).

428394919 is a wasteful number, since it uses less digits than its factorization.

428394919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425489.

The product of its digits is 559872, while the sum is 49.

The square root of 428394919 is about 20697.7032300688. The cubic root of 428394919 is about 753.8439210741.

The spelling of 428394919 in words is "four hundred twenty-eight million, three hundred ninety-four thousand, nine hundred nineteen".