428299660 has 12 divisors (see below), whose sum is σ = 899429328. Its totient is φ = 171319856.

The previous prime is 428299631. The next prime is 428299661. The reversal of 428299660 is 66992824.

It is a super-2 number, since 2×428299660² = 366881197512231200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 428299660.

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 3 ways as a sum of consecutive naturals, for example, 10707472 + ... + 10707511.

It is an arithmetic number, because the mean of its divisors is an integer number (74952444).

Almost surely, 2^428299660 is an apocalyptic number.

It is an amenable number.

428299660 is an abundant number, since it is smaller than the sum of its proper divisors (471129668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428299660 is a wasteful number, since it uses less digits than its factorization.

428299660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21414992 (or 21414990 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 428299660 is about 20695.4019047710. The cubic root of 428299660 is about 753.7880413720.

The spelling of 428299660 in words is "four hundred twenty-eight million, two hundred ninety-nine thousand, six hundred sixty".