1243890084 has 24 divisors (see below), whose sum is σ = 2915202528. Its totient is φ = 412802560.

The previous prime is 1243890059. The next prime is 1243890091. The reversal of 1243890084 is 4800983421.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225597 + ... + 231044.

It is an arithmetic number, because the mean of its divisors is an integer number (121466772).

Almost surely, 2^1243890084 is an apocalyptic number.

It is an amenable number.

1243890084 is an abundant number, since it is smaller than the sum of its proper divisors (1671312444).

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

1243890084 is a wasteful number, since it uses less digits than its factorization.

1243890084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456875 (or 456873 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 1243890084 is about 35268.8259515397. The cubic root of 1243890084 is about 1075.4593555879.

The spelling of 1243890084 in words is "one billion, two hundred forty-three million, eight hundred ninety thousand, eighty-four".