28546388 has 36 divisors (see below), whose sum is σ = 55430172. Its totient is φ = 12787200.

The previous prime is 28546387. The next prime is 28546403. The reversal of 28546388 is 88364582.

It can be written as a sum of positive squares in 6 ways, for example, as 9168784 + 19377604 = 3028^2 + 4402^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28546387) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 70988 + ... + 71388.

It is an arithmetic number, because the mean of its divisors is an integer number (1539727).

Almost surely, 2^28546388 is an apocalyptic number.

It is an amenable number.

28546388 is a deficient number, since it is larger than the sum of its proper divisors (26883784).

28546388 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 28546388 = (58638248)₉.

28546388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 453 counting only the distinct ones).

The product of its digits is 368640, while the sum is 44.

The square root of 28546388 is about 5342.8819938307. The cubic root of 28546388 is about 305.6213723026.

The spelling of 28546388 in words is "twenty-eight million, five hundred forty-six thousand, three hundred eighty-eight".