428999965 has 8 divisors (see below), whose sum is σ = 514916568. Its totient is φ = 343122240.

The previous prime is 428999959. The next prime is 428999969. The reversal of 428999965 is 569999824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2247001 + 426752964 = 1499^2 + 20658^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 428999965 - 2¹⁵ = 428967197 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 (428999969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27579 + ... + 40231.

It is an arithmetic number, because the mean of its divisors is an integer number (64364571).

Almost surely, 2^428999965 is an apocalyptic number.

It is an amenable number.

428999965 is a deficient number, since it is larger than the sum of its proper divisors (85916603).

428999965 is a wasteful number, since it uses less digits than its factorization.

428999965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19439.

The product of its digits is 12597120, while the sum is 61.

The square root of 428999965 is about 20712.3143323000. The cubic root of 428999965 is about 754.1986527070.

The spelling of 428999965 in words is "four hundred twenty-eight million, nine hundred ninety-nine thousand, nine hundred sixty-five".