209054340 has 144 divisors (see below), whose sum is σ = 728320320. Its totient is φ = 48003840.

The previous prime is 209054333. The next prime is 209054387. The reversal of 209054340 is 43450902.

209054340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34842 + ... + 40398.

It is an arithmetic number, because the mean of its divisors is an integer number (5057780).

Almost surely, 2^209054340 is an apocalyptic number.

209054340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209054340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (364160160).

209054340 is an abundant number, since it is smaller than the sum of its proper divisors (519265980).

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

209054340 is a wasteful number, since it uses less digits than its factorization.

209054340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5602 (or 5597 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 209054340 is about 14458.7115608549. The cubic root of 209054340 is about 593.4986416751.

The spelling of 209054340 in words is "two hundred nine million, fifty-four thousand, three hundred forty".