991744230 has 16 divisors (see below), whose sum is σ = 2380186224. Its totient is φ = 264465120.

The previous prime is 991744223. The next prime is 991744231. The reversal of 991744230 is 32447199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991744231) 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, 16529041 + ... + 16529100.

It is an arithmetic number, because the mean of its divisors is an integer number (148761639).

Almost surely, 2^991744230 is an apocalyptic number.

991744230 is an abundant number, since it is smaller than the sum of its proper divisors (1388441994).

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

991744230 is a wasteful number, since it uses less digits than its factorization.

991744230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33058151.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 991744230 is about 31491.9708814803. The cubic root of 991744230 is about 997.2404686581.

The spelling of 991744230 in words is "nine hundred ninety-one million, seven hundred forty-four thousand, two hundred thirty".