28575100 has 36 divisors (see below), whose sum is σ = 63692104. Its totient is φ = 11119680.

The previous prime is 28575083. The next prime is 28575119. The reversal of 28575100 is 157582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162 + ... + 7561.

Almost surely, 2^28575100 is an apocalyptic number.

28575100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28575100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31846052).

28575100 is an abundant number, since it is smaller than the sum of its proper divisors (35117004).

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

28575100 is a wasteful number, since it uses less digits than its factorization.

28575100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7774 (or 7767 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 28575100 is about 5345.5682579123. The cubic root of 28575100 is about 305.7238027807.

It can be divided in two parts, 28 and 575100, that added together give a triangular number (575128 = T₁₀₇₂).

The spelling of 28575100 in words is "twenty-eight million, five hundred seventy-five thousand, one hundred".