231209760 has 96 divisors (see below), whose sum is σ = 734069952. Its totient is φ = 61168640.

The previous prime is 231209747. The next prime is 231209767. The reversal of 231209760 is 67902132.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (231209767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61042 + ... + 64718.

It is an arithmetic number, because the mean of its divisors is an integer number (7646562).

Almost surely, 2^231209760 is an apocalyptic number.

231209760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231209760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367034976).

231209760 is an abundant number, since it is smaller than the sum of its proper divisors (502860192).

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

231209760 is a wasteful number, since it uses less digits than its factorization.

231209760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826 (or 3818 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 231209760 is about 15205.5831851330. The cubic root of 231209760 is about 613.7649083891.

Subtracting from 231209760 its reverse (67902132), we obtain a triangular number (163307628 = T₁₈₀₇₂).

The spelling of 231209760 in words is "two hundred thirty-one million, two hundred nine thousand, seven hundred sixty".