428241668 has 12 divisors (see below), whose sum is σ = 751866192. Its totient is φ = 213422760.

The previous prime is 428241661. The next prime is 428241677. The reversal of 428241668 is 866142824.

It is a super-2 number, since 2×428241668² = 366781852422844448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428241661) 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, 173138 + ... + 175593.

It is an arithmetic number, because the mean of its divisors is an integer number (62655516).

Almost surely, 2^428241668 is an apocalyptic number.

It is an amenable number.

428241668 is a deficient number, since it is larger than the sum of its proper divisors (323624524).

428241668 is a wasteful number, since it uses less digits than its factorization.

428241668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349042 (or 349040 counting only the distinct ones).

The product of its digits is 147456, while the sum is 41.

The square root of 428241668 is about 20694.0007731710. Note that the first 3 decimals coincide. The cubic root of 428241668 is about 753.7540187368.

The spelling of 428241668 in words is "four hundred twenty-eight million, two hundred forty-one thousand, six hundred sixty-eight".