28478553 has 16 divisors (see below), whose sum is σ = 41504256. Its totient is φ = 17291520.

The previous prime is 28478537. The next prime is 28478557. The reversal of 28478553 is 35587482.

It is not a de Polignac number, because 28478553 - 2⁴ = 28478537 is a prime.

It is a super-2 number, since 2×28478553² = 1622055961947618, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28478557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7426 + ... + 10587.

It is an arithmetic number, because the mean of its divisors is an integer number (2594016).

Almost surely, 2^28478553 is an apocalyptic number.

It is an amenable number.

28478553 is a deficient number, since it is larger than the sum of its proper divisors (13025703).

28478553 is a wasteful number, since it uses less digits than its factorization.

28478553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18064.

The product of its digits is 268800, while the sum is 42.

The square root of 28478553 is about 5336.5300523842. The cubic root of 28478553 is about 305.3790968264.

The spelling of 28478553 in words is "twenty-eight million, four hundred seventy-eight thousand, five hundred fifty-three".