28487332 has 6 divisors (see below), whose sum is σ = 49852838. Its totient is φ = 14243664.

The previous prime is 28487297. The next prime is 28487351. The reversal of 28487332 is 23378482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17089956 + 11397376 = 4134^2 + 3376^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28487291 and 28487300.

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 as a sum of consecutive naturals, namely, 3560913 + ... + 3560920.

Almost surely, 2^28487332 is an apocalyptic number.

It is an amenable number.

28487332 is a deficient number, since it is larger than the sum of its proper divisors (21365506).

28487332 is a wasteful number, since it uses less digits than its factorization.

28487332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7121837 (or 7121835 counting only the distinct ones).

The product of its digits is 64512, while the sum is 37.

The square root of 28487332 is about 5337.3525272367. The cubic root of 28487332 is about 305.4104730421.

It can be divided in two parts, 284 and 87332, that added together give a square (87616 = 296²).

The spelling of 28487332 in words is "twenty-eight million, four hundred eighty-seven thousand, three hundred thirty-two".