28529081 has 8 divisors (see below), whose sum is σ = 33363264. Its totient is φ = 23884560.

The previous prime is 28529041. The next prime is 28529101. The reversal of 28529081 is 18092582.

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

It is not a de Polignac number, because 28529081 - 2¹⁴ = 28512697 is a prime.

It is a super-2 number, since 2×28529081² = 1627816925409122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28529041) 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, 47090 + ... + 47691.

It is an arithmetic number, because the mean of its divisors is an integer number (4170408).

Almost surely, 2^28529081 is an apocalyptic number.

It is an amenable number.

28529081 is a deficient number, since it is larger than the sum of its proper divisors (4834183).

28529081 is an equidigital number, since it uses as much as digits as its factorization.

28529081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94831.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 28529081 is about 5341.2621167660. The cubic root of 28529081 is about 305.5595961461.

The spelling of 28529081 in words is "twenty-eight million, five hundred twenty-nine thousand, eighty-one".