202472809 has 24 divisors (see below), whose sum is σ = 263148480. Its totient is φ = 152312160.

The previous prime is 202472789. The next prime is 202472833. The reversal of 202472809 is 908274202.

202472809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 202472809 - 2⁹ = 202472297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (202472849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20442 + ... + 28684.

It is an arithmetic number, because the mean of its divisors is an integer number (10964520).

Almost surely, 2^202472809 is an apocalyptic number.

202472809 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

202472809 is a deficient number, since it is larger than the sum of its proper divisors (60675671).

202472809 is a wasteful number, since it uses less digits than its factorization.

202472809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8301 (or 8290 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 202472809 is about 14229.2940443298. The cubic root of 202472809 is about 587.2038612541.

The spelling of 202472809 in words is "two hundred two million, four hundred seventy-two thousand, eight hundred nine".