428008869 has 24 divisors (see below), whose sum is σ = 624218400. Its totient is φ = 282592800.

The previous prime is 428008853. The next prime is 428008873. The reversal of 428008869 is 968800824.

It is a happy number.

It is not a de Polignac number, because 428008869 - 2⁴ = 428008853 is a prime.

It is a super-2 number, since 2×428008869² = 366383183885318322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428008849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 610219 + ... + 610919.

It is an arithmetic number, because the mean of its divisors is an integer number (26009100).

Almost surely, 2^428008869 is an apocalyptic number.

It is an amenable number.

428008869 is a deficient number, since it is larger than the sum of its proper divisors (196209531).

428008869 is a wasteful number, since it uses less digits than its factorization.

428008869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265 (or 1262 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 428008869 is about 20688.3752141148. The cubic root of 428008869 is about 753.6174097446.

The spelling of 428008869 in words is "four hundred twenty-eight million, eight thousand, eight hundred sixty-nine".