28461040 has 20 divisors (see below), whose sum is σ = 66172104. Its totient is φ = 11384384.

The previous prime is 28460923. The next prime is 28461047. The reversal of 28461040 is 4016482.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 28460996 and 28461014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28461047) 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 3 ways as a sum of consecutive naturals, for example, 177802 + ... + 177961.

Almost surely, 2^28461040 is an apocalyptic number.

28461040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28461040 is an abundant number, since it is smaller than the sum of its proper divisors (37711064).

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

28461040 is a wasteful number, since it uses less digits than its factorization.

28461040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355776 (or 355770 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 28461040 is about 5334.8889398000. Note that the first 3 decimals coincide. The cubic root of 28461040 is about 305.3164859583.

The spelling of 28461040 in words is "twenty-eight million, four hundred sixty-one thousand, forty".