1298105984 has 32 divisors (see below), whose sum is σ = 2955511200. Its totient is φ = 556330752.

The previous prime is 1298105983. The next prime is 1298105999. The reversal of 1298105984 is 4895018921.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-4 number, since 4×1298105984⁴ (a number of 38 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1298105983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723494 + ... + 725285.

It is an arithmetic number, because the mean of its divisors is an integer number (92359725).

Almost surely, 2^1298105984 is an apocalyptic number.

1298105984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1298105984 is an abundant number, since it is smaller than the sum of its proper divisors (1657405216).

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

1298105984 is an equidigital number, since it uses as much as digits as its factorization.

1298105984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448800 (or 1448788 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 47.

The square root of 1298105984 is about 36029.2379047906. The cubic root of 1298105984 is about 1090.8625958096.

The spelling of 1298105984 in words is "one billion, two hundred ninety-eight million, one hundred five thousand, nine hundred eighty-four".