533728921 has 8 divisors (see below), whose sum is σ = 593236224. Its totient is φ = 476052720.

The previous prime is 533728883. The next prime is 533728967. The reversal of 533728921 is 129827335.

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

It is not a de Polignac number, because 533728921 - 2²⁷ = 399511193 is a prime.

It is a super-2 number, since 2×533728921² = 569733122223648482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (533728621) 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, 457161 + ... + 458326.

It is an arithmetic number, because the mean of its divisors is an integer number (74154528).

Almost surely, 2^533728921 is an apocalyptic number.

It is an amenable number.

533728921 is a deficient number, since it is larger than the sum of its proper divisors (59507303).

533728921 is a wasteful number, since it uses less digits than its factorization.

533728921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915551.

The product of its digits is 90720, while the sum is 40.

The square root of 533728921 is about 23102.5739042211. The cubic root of 533728921 is about 811.1607201985.

The spelling of 533728921 in words is "five hundred thirty-three million, seven hundred twenty-eight thousand, nine hundred twenty-one".