28480577 has 4 divisors (see below), whose sum is σ = 29142960. Its totient is φ = 27818196.

The previous prime is 28480567. The next prime is 28480589. The reversal of 28480577 is 77508482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28480577 - 2⁶ = 28480513 is a prime.

It is a super-2 number, since 2×28480577² = 1622286532505858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28480567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331127 + ... + 331212.

It is an arithmetic number, because the mean of its divisors is an integer number (7285740).

Almost surely, 2^28480577 is an apocalyptic number.

It is an amenable number.

28480577 is a deficient number, since it is larger than the sum of its proper divisors (662383).

28480577 is an equidigital number, since it uses as much as digits as its factorization.

28480577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662382.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 28480577 is about 5336.7196853498. The cubic root of 28480577 is about 305.3863311904.

The spelling of 28480577 in words is "twenty-eight million, four hundred eighty thousand, five hundred seventy-seven".