28545700 has 18 divisors (see below), whose sum is σ = 61944386. Its totient is φ = 11418240.

The previous prime is 28545689. The next prime is 28545719. The reversal of 28545700 is 754582.

It can be written as a sum of positive squares in 3 ways, for example, as 3305124 + 25240576 = 1818^2 + 5024^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142629 + ... + 142828.

Almost surely, 2^28545700 is an apocalyptic number.

28545700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28545700 is an abundant number, since it is smaller than the sum of its proper divisors (33398686).

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

28545700 is a wasteful number, since it uses less digits than its factorization.

28545700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285471 (or 285464 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 28545700 is about 5342.8176087155. The cubic root of 28545700 is about 305.6189170101.

The spelling of 28545700 in words is "twenty-eight million, five hundred forty-five thousand, seven hundred".