428168533 has 8 divisors (see below), whose sum is σ = 461619200. Its totient is φ = 394791408.

The previous prime is 428168519. The next prime is 428168539. The reversal of 428168533 is 335861824.

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

It is a cyclic number.

It is not a de Polignac number, because 428168533 - 2¹⁷ = 428037461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428168539) 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, 5973 + ... + 29866.

It is an arithmetic number, because the mean of its divisors is an integer number (57702400).

Almost surely, 2^428168533 is an apocalyptic number.

428168533 is the 11947-th octagonal number.

It is an amenable number.

428168533 is a deficient number, since it is larger than the sum of its proper divisors (33450667).

428168533 is a wasteful number, since it uses less digits than its factorization.

428168533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36771.

The product of its digits is 138240, while the sum is 40.

The square root of 428168533 is about 20692.2336397016. The cubic root of 428168533 is about 753.7111076559.

The spelling of 428168533 in words is "four hundred twenty-eight million, one hundred sixty-eight thousand, five hundred thirty-three".