428618281 has 16 divisors (see below), whose sum is σ = 539803264. Its totient is φ = 331236864.

The previous prime is 428618279. The next prime is 428618287. The reversal of 428618281 is 182816824.

It is not a de Polignac number, because 428618281 - 2¹ = 428618279 is a prime.

It is a super-2 number, since 2×428618281² = 367427261614789922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428618287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50856 + ... + 58681.

It is an arithmetic number, because the mean of its divisors is an integer number (33737704).

Almost surely, 2^428618281 is an apocalyptic number.

It is an amenable number.

428618281 is a deficient number, since it is larger than the sum of its proper divisors (111184983).

428618281 is a wasteful number, since it uses less digits than its factorization.

428618281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109600.

The product of its digits is 49152, while the sum is 40.

The square root of 428618281 is about 20703.0983430017. The cubic root of 428618281 is about 753.9749145592.

The spelling of 428618281 in words is "four hundred twenty-eight million, six hundred eighteen thousand, two hundred eighty-one".