231628494240 has 864 divisors, whose sum is σ = 964911782016. Its totient is φ = 51799357440.

The previous prime is 231628494217. The next prime is 231628494247. The reversal of 231628494240 is 42494826132.

231628494240 is a `hidden beast` number, since 2 + 316 + 2 + 8 + 4 + 94 + 240 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (231628494247) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 150114909 + ... + 150116451.

It is an arithmetic number, because the mean of its divisors is an integer number (1116796044).

Almost surely, 2^231628494240 is an apocalyptic number.

231628494240 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 231628494240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482455891008).

231628494240 is an abundant number, since it is smaller than the sum of its proper divisors (733283287776).

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

231628494240 is a wasteful number, since it uses less digits than its factorization.

231628494240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606 (or 1577 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 231628494240 in words is "two hundred thirty-one billion, six hundred twenty-eight million, four hundred ninety-four thousand, two hundred forty".