428963997 has 64 divisors (see below), whose sum is σ = 730828800. Its totient is φ = 219193920.

The previous prime is 428963993. The next prime is 428964023. The reversal of 428963997 is 799369824.

It is not a de Polignac number, because 428963997 - 2² = 428963993 is a prime.

It is a super-2 number, since 2×428963997² = 368020221444432018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428963993) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2878879 + ... + 2879027.

It is an arithmetic number, because the mean of its divisors is an integer number (11419200).

Almost surely, 2^428963997 is an apocalyptic number.

It is an amenable number.

428963997 is a deficient number, since it is larger than the sum of its proper divisors (301864803).

428963997 is a wasteful number, since it uses less digits than its factorization.

428963997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 273 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 57.

The square root of 428963997 is about 20711.4460383625. The cubic root of 428963997 is about 754.1775744028.

It can be divided in two parts, 4289 and 63997, that added together give a palindrome (68286).

The spelling of 428963997 in words is "four hundred twenty-eight million, nine hundred sixty-three thousand, nine hundred ninety-seven".