28321036 has 6 divisors (see below), whose sum is σ = 49561820. Its totient is φ = 14160516.

The previous prime is 28320979. The next prime is 28321061. The reversal of 28321036 is 63012382.

It is a super-2 number, since 2×28321036² = 1604162160226592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28321036.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3540126 + ... + 3540133.

Almost surely, 2^28321036 is an apocalyptic number.

It is an amenable number.

28321036 is a deficient number, since it is larger than the sum of its proper divisors (21240784).

28321036 is a wasteful number, since it uses less digits than its factorization.

28321036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7080263 (or 7080261 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 28321036 is about 5321.7512155305. The cubic root of 28321036 is about 304.8150307296.

The spelling of 28321036 in words is "twenty-eight million, three hundred twenty-one thousand, thirty-six".