1209090272 has 192 divisors, whose sum is σ = 2834818560. Its totient is φ = 503193600.

The previous prime is 1209090227. The next prime is 1209090277. The reversal of 1209090272 is 2720909021.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209090277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19821122 + ... + 19821182.

It is an arithmetic number, because the mean of its divisors is an integer number (14764680).

Almost surely, 2^1209090272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209090272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1417409280).

1209090272 is an abundant number, since it is smaller than the sum of its proper divisors (1625728288).

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

1209090272 is a wasteful number, since it uses less digits than its factorization.

1209090272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1209090272 is about 34771.9753824829. The cubic root of 1209090272 is about 1065.3351152128.

Adding to 1209090272 its reverse (2720909021), we get a palindrome (3929999293).

The spelling of 1209090272 in words is "one billion, two hundred nine million, ninety thousand, two hundred seventy-two".