1211472288 has 240 divisors, whose sum is σ = 3878277480. Its totient is φ = 368769024.

The previous prime is 1211472259. The next prime is 1211472289. The reversal of 1211472288 is 8822741121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 996791184 + 214681104 = 31572^2 + 14652^2 .

It is a super-3 number, since 3×1211472288³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1211472289) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5290158 + ... + 5290386.

Almost surely, 2^1211472288 is an apocalyptic number.

1211472288 is a gapful number since it is divisible by the number (18) 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 1211472288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1939138740).

1211472288 is an abundant number, since it is smaller than the sum of its proper divisors (2666805192).

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

1211472288 is a wasteful number, since it uses less digits than its factorization.

1211472288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 404 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 1211472288 is about 34806.2104803151. The cubic root of 1211472288 is about 1066.0342581159.

The spelling of 1211472288 in words is "one billion, two hundred eleven million, four hundred seventy-two thousand, two hundred eighty-eight".