243502040 has 32 divisors (see below), whose sum is σ = 553009680. Its totient is φ = 96488832.

The previous prime is 243502031. The next prime is 243502099. The reversal of 243502040 is 40205342.

243502040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24167 + ... + 32726.

Almost surely, 2^243502040 is an apocalyptic number.

243502040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243502040 is an abundant number, since it is smaller than the sum of its proper divisors (309507640).

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

243502040 is a wasteful number, since it uses less digits than its factorization.

243502040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57011 (or 57007 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 243502040 is about 15604.5519000066. The cubic root of 243502040 is about 624.4545983310.

Adding to 243502040 its reverse (40205342), we get a palindrome (283707382).

The spelling of 243502040 in words is "two hundred forty-three million, five hundred two thousand, forty".