231436836 has 72 divisors (see below), whose sum is σ = 611554944. Its totient is φ = 73725120.

The previous prime is 231436823. The next prime is 231436837. The reversal of 231436836 is 638634132.

231436836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 231436836.

It is not an unprimeable number, because it can be changed into a prime (231436837) 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, 71166 + ... + 74346.

Almost surely, 2^231436836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231436836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305777472).

231436836 is an abundant number, since it is smaller than the sum of its proper divisors (380118108).

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

231436836 is a wasteful number, since it uses less digits than its factorization.

231436836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281 (or 3276 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 231436836 is about 15213.0482152657. The cubic root of 231436836 is about 613.9657731489.

The spelling of 231436836 in words is "two hundred thirty-one million, four hundred thirty-six thousand, eight hundred thirty-six".