243400528 has 20 divisors (see below), whose sum is σ = 538958560. Its totient is φ = 104314464.

The previous prime is 243400517. The next prime is 243400529. The reversal of 243400528 is 825004342.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 243400496 and 243400505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243400529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1086498 + ... + 1086721.

It is an arithmetic number, because the mean of its divisors is an integer number (26947928).

Almost surely, 2^243400528 is an apocalyptic number.

243400528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

243400528 is an abundant number, since it is smaller than the sum of its proper divisors (295558032).

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

243400528 is a wasteful number, since it uses less digits than its factorization.

243400528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173234 (or 2173228 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 243400528 is about 15601.2989202822. The cubic root of 243400528 is about 624.3678113156.

The spelling of 243400528 in words is "two hundred forty-three million, four hundred thousand, five hundred twenty-eight".