243764440 has 16 divisors (see below), whose sum is σ = 548470080. Its totient is φ = 97505760.

The previous prime is 243764347. The next prime is 243764461. The reversal of 243764440 is 44467342.

243764440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243764440² = 118842204417027200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243764396 and 243764405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3047016 + ... + 3047095.

It is an arithmetic number, because the mean of its divisors is an integer number (34279380).

Almost surely, 2^243764440 is an apocalyptic number.

243764440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243764440 is an abundant number, since it is smaller than the sum of its proper divisors (304705640).

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

243764440 is a wasteful number, since it uses less digits than its factorization.

243764440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6094122 (or 6094118 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 34.

The square root of 243764440 is about 15612.9574392554. The cubic root of 243764440 is about 624.6788237816.

The spelling of 243764440 in words is "two hundred forty-three million, seven hundred sixty-four thousand, four hundred forty".