28463864 has 64 divisors (see below), whose sum is σ = 63504000. Its totient is φ = 11790720.

The previous prime is 28463861. The next prime is 28463867. The reversal of 28463864 is 46836482.

It is an interprime number because it is at equal distance from previous prime (28463861) and next prime (28463867).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28463861) 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 15 ways as a sum of consecutive naturals, for example, 158927 + ... + 159105.

It is an arithmetic number, because the mean of its divisors is an integer number (992250).

Almost surely, 2^28463864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28463864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31752000).

28463864 is an abundant number, since it is smaller than the sum of its proper divisors (35040136).

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

28463864 is a wasteful number, since it uses less digits than its factorization.

28463864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 344 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 28463864 is about 5335.1536060361. The cubic root of 28463864 is about 305.3265838002.

The spelling of 28463864 in words is "twenty-eight million, four hundred sixty-three thousand, eight hundred sixty-four".