243454540 has 96 divisors (see below), whose sum is σ = 622540800. Its totient is φ = 79789248.

The previous prime is 243454531. The next prime is 243454559. The reversal of 243454540 is 45454342.

It is a super-2 number, since 2×243454540² = 118540226093223200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157009 + ... + 158551.

It is an arithmetic number, because the mean of its divisors is an integer number (6484800).

Almost surely, 2^243454540 is an apocalyptic number.

243454540 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 243454540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311270400).

243454540 is an abundant number, since it is smaller than the sum of its proper divisors (379086260).

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

243454540 is a wasteful number, since it uses less digits than its factorization.

243454540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 31.

The square root of 243454540 is about 15603.0298339778. The cubic root of 243454540 is about 624.4139915222.

The spelling of 243454540 in words is "two hundred forty-three million, four hundred fifty-four thousand, five hundred forty".