428887429 has 4 divisors (see below), whose sum is σ = 439348140. Its totient is φ = 418426720.

The previous prime is 428887397. The next prime is 428887447. The reversal of 428887429 is 924788824.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73564929 + 355322500 = 8577^2 + 18850^2 .

It is a cyclic number.

It is not a de Polignac number, because 428887429 - 2⁵ = 428887397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428887469) 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, 5230294 + ... + 5230375.

It is an arithmetic number, because the mean of its divisors is an integer number (109837035).

Almost surely, 2^428887429 is an apocalyptic number.

It is an amenable number.

428887429 is a deficient number, since it is larger than the sum of its proper divisors (10460711).

428887429 is a wasteful number, since it uses less digits than its factorization.

428887429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10460710.

The product of its digits is 2064384, while the sum is 52.

The square root of 428887429 is about 20709.5975093675. The cubic root of 428887429 is about 754.1326993821.

The spelling of 428887429 in words is "four hundred twenty-eight million, eight hundred eighty-seven thousand, four hundred twenty-nine".