809235252 has 48 divisors (see below), whose sum is σ = 2397736320. Its totient is φ = 231209856.

The previous prime is 809235233. The next prime is 809235263. The reversal of 809235252 is 252532908.

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 15 ways as a sum of consecutive naturals, for example, 534453 + ... + 535964.

It is an arithmetic number, because the mean of its divisors is an integer number (49952840).

Almost surely, 2^809235252 is an apocalyptic number.

It is an amenable number.

809235252 is an abundant number, since it is smaller than the sum of its proper divisors (1588501068).

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

809235252 is a wasteful number, since it uses less digits than its factorization.

809235252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070437 (or 1070429 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 809235252 is about 28447.0605159830. The cubic root of 809235252 is about 931.8762952344.

The spelling of 809235252 in words is "eight hundred nine million, two hundred thirty-five thousand, two hundred fifty-two".