230991644 has 24 divisors (see below), whose sum is σ = 436378320. Its totient is φ = 106354944.

The previous prime is 230991643. The next prime is 230991647. The reversal of 230991644 is 446199032.

230991644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 230991598 and 230991607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230991643) 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, 17387 + ... + 27645.

It is an arithmetic number, because the mean of its divisors is an integer number (18182430).

Almost surely, 2^230991644 is an apocalyptic number.

It is an amenable number.

230991644 is a deficient number, since it is larger than the sum of its proper divisors (205386676).

230991644 is a wasteful number, since it uses less digits than its factorization.

230991644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10709 (or 10707 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 230991644 is about 15198.4092588665. The cubic root of 230991644 is about 613.5718455102.

The spelling of 230991644 in words is "two hundred thirty million, nine hundred ninety-one thousand, six hundred forty-four".