243701406 has 64 divisors (see below), whose sum is σ = 585446400. Its totient is φ = 74698848.

The previous prime is 243701389. The next prime is 243701431. The reversal of 243701406 is 604107342.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 243701406.

It is a congruent number.

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, 251535 + ... + 252501.

It is an arithmetic number, because the mean of its divisors is an integer number (9147600).

Almost surely, 2^243701406 is an apocalyptic number.

243701406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 243701406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292723200).

243701406 is an abundant number, since it is smaller than the sum of its proper divisors (341744994).

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

243701406 is a wasteful number, since it uses less digits than its factorization.

243701406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350 (or 1344 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 243701406 is about 15610.9386649234. The cubic root of 243701406 is about 624.6249748014.

Adding to 243701406 its reverse (604107342), we get a palindrome (847808748).

The spelling of 243701406 in words is "two hundred forty-three million, seven hundred one thousand, four hundred six".