243897972 has 24 divisors (see below), whose sum is σ = 570745056. Its totient is φ = 81063648.

The previous prime is 243897967. The next prime is 243897991. The reversal of 243897972 is 279798342.

243897972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 25123 + ... + 33450.

It is an arithmetic number, because the mean of its divisors is an integer number (23781044).

Almost surely, 2^243897972 is an apocalyptic number.

It is an amenable number.

243897972 is an abundant number, since it is smaller than the sum of its proper divisors (326847084).

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

243897972 is a wasteful number, since it uses less digits than its factorization.

243897972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58927 (or 58925 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 51.

The square root of 243897972 is about 15617.2331736451. The cubic root of 243897972 is about 624.7928674680.

The spelling of 243897972 in words is "two hundred forty-three million, eight hundred ninety-seven thousand, nine hundred seventy-two".