428893121 has 8 divisors (see below), whose sum is σ = 452934720. Its totient is φ = 405301072.

The previous prime is 428893111. The next prime is 428893139. The reversal of 428893121 is 121398824.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428893121 is a prime.

It is a super-2 number, since 2×428893121² = 367898618482241282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (428893111) 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, 110426 + ... + 114243.

It is an arithmetic number, because the mean of its divisors is an integer number (56616840).

Almost surely, 2^428893121 is an apocalyptic number.

It is an amenable number.

428893121 is a deficient number, since it is larger than the sum of its proper divisors (24041599).

428893121 is a wasteful number, since it uses less digits than its factorization.

428893121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224775.

The product of its digits is 27648, while the sum is 38.

The square root of 428893121 is about 20709.7349331178. The cubic root of 428893121 is about 754.1360355368.

The spelling of 428893121 in words is "four hundred twenty-eight million, eight hundred ninety-three thousand, one hundred twenty-one".