209094740 has 12 divisors (see below), whose sum is σ = 439098996. Its totient is φ = 83637888.

The previous prime is 209094719. The next prime is 209094749. The reversal of 209094740 is 47490902.

It can be written as a sum of positive squares in 2 ways, for example, as 160680976 + 48413764 = 12676^2 + 6958^2 .

It is a super-2 number, since 2×209094740² = 87441220591335200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 209094740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209094749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5227349 + ... + 5227388.

It is an arithmetic number, because the mean of its divisors is an integer number (36591583).

Almost surely, 2^209094740 is an apocalyptic number.

209094740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209094740 is an abundant number, since it is smaller than the sum of its proper divisors (230004256).

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

209094740 is a wasteful number, since it uses less digits than its factorization.

209094740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10454746 (or 10454744 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 209094740 is about 14460.1085749727. The cubic root of 209094740 is about 593.5368706522.

The spelling of 209094740 in words is "two hundred nine million, ninety-four thousand, seven hundred forty".