28859400 has 72 divisors (see below), whose sum is σ = 96925530. Its totient is φ = 7695360.

The previous prime is 28859393. The next prime is 28859417. The reversal of 28859400 is 495882.

It can be written as a sum of positive squares in 3 ways, for example, as 11168964 + 17690436 = 3342^2 + 4206^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6217 + ... + 9816.

Almost surely, 2^28859400 is an apocalyptic number.

28859400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28859400 is an abundant number, since it is smaller than the sum of its proper divisors (68066130).

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

28859400 is a wasteful number, since it uses less digits than its factorization.

28859400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16055 (or 16043 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28859400 is about 5372.0945635757. The cubic root of 28859400 is about 306.7343633367.

The spelling of 28859400 in words is "twenty-eight million, eight hundred fifty-nine thousand, four hundred".