1290846816 has 144 divisors (see below), whose sum is σ = 4213617408. Its totient is φ = 367200000.

The previous prime is 1290846769. The next prime is 1290846827. The reversal of 1290846816 is 6186480921.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504741 + ... + 507291.

It is an arithmetic number, because the mean of its divisors is an integer number (29261232).

Almost surely, 2^1290846816 is an apocalyptic number.

1290846816 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 1290846816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2106808704).

1290846816 is an abundant number, since it is smaller than the sum of its proper divisors (2922770592).

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

1290846816 is a wasteful number, since it uses less digits than its factorization.

1290846816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825 (or 2814 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1290846816 is about 35928.3567116560. The cubic root of 1290846816 is about 1088.8253811141.

The spelling of 1290846816 in words is "one billion, two hundred ninety million, eight hundred forty-six thousand, eight hundred sixteen".