28730546 has 24 divisors (see below), whose sum is σ = 48998124. Its totient is φ = 12558240.

The previous prime is 28730509. The next prime is 28730551. The reversal of 28730546 is 64503782.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28504921 + 225625 = 5339^2 + 475^2 .

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 11 ways as a sum of consecutive naturals, for example, 7856 + ... + 10916.

Almost surely, 2^28730546 is an apocalyptic number.

28730546 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28730546 is a deficient number, since it is larger than the sum of its proper divisors (20267578).

28730546 is a wasteful number, since it uses less digits than its factorization.

28730546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114 (or 3095 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 28730546 is about 5360.0882455422. The cubic root of 28730546 is about 306.2771706561.

The spelling of 28730546 in words is "twenty-eight million, seven hundred thirty thousand, five hundred forty-six".