28041660 has 48 divisors (see below), whose sum is σ = 87242400. Its totient is φ = 7477632.

The previous prime is 28041593. The next prime is 28041677. The reversal of 28041660 is 6614082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25425 + ... + 26504.

It is an arithmetic number, because the mean of its divisors is an integer number (1817550).

Almost surely, 2^28041660 is an apocalyptic number.

28041660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28041660 is an abundant number, since it is smaller than the sum of its proper divisors (59200740).

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

28041660 is a wasteful number, since it uses less digits than its factorization.

28041660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51947 (or 51939 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28041660 is about 5295.4376589664. The cubic root of 28041660 is about 303.8094229117.

The spelling of 28041660 in words is "twenty-eight million, forty-one thousand, six hundred sixty".