428804797 has 4 divisors (see below), whose sum is σ = 428866336. Its totient is φ = 428743260.

The previous prime is 428804791. The next prime is 428804819. The reversal of 428804797 is 797408824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428804797 - 2⁷ = 428804669 is a prime.

It is a super-2 number, since 2×428804797² = 367747107860422418, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428804797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428804791) 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, 18753 + ... + 34774.

It is an arithmetic number, because the mean of its divisors is an integer number (107216584).

Almost surely, 2^428804797 is an apocalyptic number.

It is an amenable number.

428804797 is a deficient number, since it is larger than the sum of its proper divisors (61539).

428804797 is an equidigital number, since it uses as much as digits as its factorization.

428804797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61538.

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 428804797 is about 20707.6023962215. The cubic root of 428804797 is about 754.0842643761.

The spelling of 428804797 in words is "four hundred twenty-eight million, eight hundred four thousand, seven hundred ninety-seven".