28515348 has 24 divisors (see below), whose sum is σ = 73928960. Its totient is φ = 9505080.

The previous prime is 28515269. The next prime is 28515353. The reversal of 28515348 is 84351582.

It is a happy number.

It is a super-2 number, since 2×28515348² = 1626250143122208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131908 + ... + 132123.

Almost surely, 2^28515348 is an apocalyptic number.

It is an amenable number.

28515348 is an abundant number, since it is smaller than the sum of its proper divisors (45413612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28515348 is a wasteful number, since it uses less digits than its factorization.

28515348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264044 (or 264036 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 28515348 is about 5339.9764044423. The cubic root of 28515348 is about 305.5105593589.

The spelling of 28515348 in words is "twenty-eight million, five hundred fifteen thousand, three hundred forty-eight".