28811562 has 32 divisors (see below), whose sum is σ = 65325120. Its totient is φ = 8398080.

The previous prime is 28811533. The next prime is 28811603. The reversal of 28811562 is 26511882.

It is a super-2 number, since 2×28811562² = 1660212209759688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8239 + ... + 11202.

It is an arithmetic number, because the mean of its divisors is an integer number (2041410).

Almost surely, 2^28811562 is an apocalyptic number.

28811562 is an abundant number, since it is smaller than the sum of its proper divisors (36513558).

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

28811562 is a wasteful number, since it uses less digits than its factorization.

28811562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19478.

The product of its digits is 7680, while the sum is 33.

The square root of 28811562 is about 5367.6402636540. The cubic root of 28811562 is about 306.5647863105.

The spelling of 28811562 in words is "twenty-eight million, eight hundred eleven thousand, five hundred sixty-two".