28644060 has 48 divisors (see below), whose sum is σ = 80640000. Its totient is φ = 7596864.

The previous prime is 28644053. The next prime is 28644071. The reversal of 28644060 is 6044682.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 10741 + ... + 13139.

It is an arithmetic number, because the mean of its divisors is an integer number (1680000).

Almost surely, 2^28644060 is an apocalyptic number.

28644060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28644060 is an abundant number, since it is smaller than the sum of its proper divisors (51995940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28644060 is a wasteful number, since it uses less digits than its factorization.

28644060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610 (or 2608 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 28644060 is about 5352.0145739712. The cubic root of 28644060 is about 305.9695385970.

The spelling of 28644060 in words is "twenty-eight million, six hundred forty-four thousand, sixty".