428048399 has 4 divisors (see below), whose sum is σ = 428920680. Its totient is φ = 427176120.

The previous prime is 428048393. The next prime is 428048419. The reversal of 428048399 is 993840824.

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 428048399 - 2²⁰ = 426999823 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428048393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435404 + ... + 436385.

It is an arithmetic number, because the mean of its divisors is an integer number (107230170).

Almost surely, 2^428048399 is an apocalyptic number.

428048399 is a deficient number, since it is larger than the sum of its proper divisors (872281).

428048399 is an equidigital number, since it uses as much as digits as its factorization.

428048399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872280.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 428048399 is about 20689.3305594937. The cubic root of 428048399 is about 753.6406098706.

The spelling of 428048399 in words is "four hundred twenty-eight million, forty-eight thousand, three hundred ninety-nine".