28578460 has 12 divisors (see below), whose sum is σ = 60014808. Its totient is φ = 11431376.

The previous prime is 28578457. The next prime is 28578463. The reversal of 28578460 is 6487582.

It is an interprime number because it is at equal distance from previous prime (28578457) and next prime (28578463).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28578463) 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 3 ways as a sum of consecutive naturals, for example, 714442 + ... + 714481.

It is an arithmetic number, because the mean of its divisors is an integer number (5001234).

Almost surely, 2^28578460 is an apocalyptic number.

28578460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28578460 is an abundant number, since it is smaller than the sum of its proper divisors (31436348).

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

28578460 is a wasteful number, since it uses less digits than its factorization.

28578460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428932 (or 1428930 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 28578460 is about 5345.8825277030. The cubic root of 28578460 is about 305.7357851444.

The spelling of 28578460 in words is "twenty-eight million, five hundred seventy-eight thousand, four hundred sixty".