1290709216 has 72 divisors (see below), whose sum is σ = 2796874920. Its totient is φ = 584660736.

The previous prime is 1290709201. The next prime is 1290709219. The reversal of 1290709216 is 6129070921.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290709219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319626 + ... + 323638.

It is an arithmetic number, because the mean of its divisors is an integer number (38845485).

Almost surely, 2^1290709216 is an apocalyptic number.

1290709216 is a gapful number since it is divisible by the number (16) 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 1290709216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1398437460).

1290709216 is an abundant number, since it is smaller than the sum of its proper divisors (1506165704).

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

1290709216 is a wasteful number, since it uses less digits than its factorization.

1290709216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088 (or 4057 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1290709216 is about 35926.4417386415. The cubic root of 1290709216 is about 1088.7866913449.

The spelling of 1290709216 in words is "one billion, two hundred ninety million, seven hundred nine thousand, two hundred sixteen".