428299665 has 8 divisors (see below), whose sum is σ = 685279488. Its totient is φ = 228426480.

The previous prime is 428299661. The next prime is 428299681. The reversal of 428299665 is 566992824.

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

It is not a de Polignac number, because 428299665 - 2² = 428299661 is a prime.

It is a super-2 number, since 2×428299665² = 366881206078224450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428299661) 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, 14276641 + ... + 14276670.

It is an arithmetic number, because the mean of its divisors is an integer number (85659936).

Almost surely, 2^428299665 is an apocalyptic number.

It is an amenable number.

428299665 is a deficient number, since it is larger than the sum of its proper divisors (256979823).

428299665 is a wasteful number, since it uses less digits than its factorization.

428299665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28553319.

The product of its digits is 1866240, while the sum is 51.

The square root of 428299665 is about 20695.4020255708. The cubic root of 428299665 is about 753.7880443052.

The spelling of 428299665 in words is "four hundred twenty-eight million, two hundred ninety-nine thousand, six hundred sixty-five".