28651624 has 32 divisors (see below), whose sum is σ = 55304640. Its totient is φ = 13910400.

The previous prime is 28651621. The next prime is 28651643. The reversal of 28651624 is 42615682.

It is a self number, because there is not a number n which added to its sum of digits gives 28651624.

It is not an unprimeable number, because it can be changed into a prime (28651621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41119 + ... + 41809.

It is an arithmetic number, because the mean of its divisors is an integer number (1728270).

Almost surely, 2^28651624 is an apocalyptic number.

It is an amenable number.

28651624 is a deficient number, since it is larger than the sum of its proper divisors (26653016).

28651624 is a wasteful number, since it uses less digits than its factorization.

28651624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 837 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 28651624 is about 5352.7211771210. The cubic root of 28651624 is about 305.9964685539.

It can be divided in two parts, 2865 and 1624, that added together give a square (4489 = 67²).

The spelling of 28651624 in words is "twenty-eight million, six hundred fifty-one thousand, six hundred twenty-four".