28818532 has 12 divisors (see below), whose sum is σ = 50932476. Its totient is φ = 14266400.

The previous prime is 28818521. The next prime is 28818541. The reversal of 28818532 is 23581882.

It can be written as a sum of positive squares in 2 ways, for example, as 21288996 + 7529536 = 4614^2 + 2744^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28818491 and 28818500.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35263 + ... + 36070.

It is an arithmetic number, because the mean of its divisors is an integer number (4244373).

Almost surely, 2^28818532 is an apocalyptic number.

It is an amenable number.

28818532 is a deficient number, since it is larger than the sum of its proper divisors (22113944).

28818532 is a wasteful number, since it uses less digits than its factorization.

28818532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71438 (or 71436 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 28818532 is about 5368.2894854879. The cubic root of 28818532 is about 306.5895053716.

It can be divided in two parts, 28 and 818532, that added together give a triangular number (818560 = T₁₂₇₉).

The spelling of 28818532 in words is "twenty-eight million, eight hundred eighteen thousand, five hundred thirty-two".