209264742 has 16 divisors (see below), whose sum is σ = 465032880. Its totient is φ = 69754896.

The previous prime is 209264683. The next prime is 209264743. The reversal of 209264742 is 247462902.

209264742 is a `hidden beast` number, since 2 + 0 + 9 + 2 + 647 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 209264697 and 209264706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209264743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1937583 + ... + 1937690.

It is an arithmetic number, because the mean of its divisors is an integer number (29064555).

Almost surely, 2^209264742 is an apocalyptic number.

209264742 is an abundant number, since it is smaller than the sum of its proper divisors (255768138).

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

209264742 is a wasteful number, since it uses less digits than its factorization.

209264742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875284 (or 3875278 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 209264742 is about 14465.9856905777. The cubic root of 209264742 is about 593.6976831170.

The spelling of 209264742 in words is "two hundred nine million, two hundred sixty-four thousand, seven hundred forty-two".