1211908608 has 160 divisors (see below), whose sum is σ = 3712262400. Its totient is φ = 389910528.

The previous prime is 1211908541. The next prime is 1211908661. The reversal of 1211908608 is 8068091121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399385 + ... + 402407.

It is an arithmetic number, because the mean of its divisors is an integer number (23201640).

Almost surely, 2^1211908608 is an apocalyptic number.

1211908608 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 1211908608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1856131200).

1211908608 is an abundant number, since it is smaller than the sum of its proper divisors (2500353792).

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

1211908608 is an equidigital number, since it uses as much as digits as its factorization.

1211908608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079 (or 3057 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 1211908608 is about 34812.4777630091. The cubic root of 1211908608 is about 1066.1622225889.

Adding to 1211908608 its reverse (8068091121), we get a palindrome (9279999729).

The spelling of 1211908608 in words is "one billion, two hundred eleven million, nine hundred eight thousand, six hundred eight".