1298904984 has 192 divisors, whose sum is σ = 3974880000. Its totient is φ = 394989696.

The previous prime is 1298904979. The next prime is 1298904989. The reversal of 1298904984 is 4894098921.

It is an interprime number because it is at equal distance from previous prime (1298904979) and next prime (1298904989).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1298904984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298904989) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2602767 + ... + 2603265.

It is an arithmetic number, because the mean of its divisors is an integer number (20702500).

Almost surely, 2^1298904984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298904984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1987440000).

1298904984 is an abundant number, since it is smaller than the sum of its proper divisors (2675975016).

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

1298904984 is a wasteful number, since it uses less digits than its factorization.

1298904984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 1298904984 is about 36040.3244158540. The cubic root of 1298904984 is about 1091.0863629646.

The spelling of 1298904984 in words is "one billion, two hundred ninety-eight million, nine hundred four thousand, nine hundred eighty-four".