243402420 has 48 divisors (see below), whose sum is σ = 686524608. Its totient is φ = 64431360.

The previous prime is 243402409. The next prime is 243402433. The reversal of 243402420 is 24204342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6586 + ... + 23025.

It is an arithmetic number, because the mean of its divisors is an integer number (14302596).

Almost surely, 2^243402420 is an apocalyptic number.

243402420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243402420 is an abundant number, since it is smaller than the sum of its proper divisors (443122188).

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

243402420 is a wasteful number, since it uses less digits than its factorization.

243402420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29760 (or 29758 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 243402420 is about 15601.3595561413. The cubic root of 243402420 is about 624.3694290891.

Adding to 243402420 its reverse (24204342), we get a palindrome (267606762).

The spelling of 243402420 in words is "two hundred forty-three million, four hundred two thousand, four hundred twenty".