209528148 has 24 divisors (see below), whose sum is σ = 493941952. Its totient is φ = 69122304.

The previous prime is 209528141. The next prime is 209528153. The reversal of 209528148 is 841825902.

209528148 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×209528148³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209528141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88840 + ... + 91167.

Almost surely, 2^209528148 is an apocalyptic number.

It is an amenable number.

209528148 is an abundant number, since it is smaller than the sum of its proper divisors (284413804).

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

209528148 is a wasteful number, since it uses less digits than its factorization.

209528148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180111 (or 180109 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 209528148 is about 14475.0871499967. The cubic root of 209528148 is about 593.9466786587.

The spelling of 209528148 in words is "two hundred nine million, five hundred twenty-eight thousand, one hundred forty-eight".