1398392994240 has 896 divisors, whose sum is σ = 5473958307840. Its totient is φ = 337401262080.

The previous prime is 1398392994227. The next prime is 1398392994277. The reversal of 1398392994240 is 424992938931.

1398392994240 is a `hidden beast` number, since 1 + 3 + 98 + 39 + 2 + 99 + 424 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2871443277 + ... + 2871443763.

Almost surely, 2^{1398392994240} is an apocalyptic number.

1398392994240 is a gapful number since it is divisible by the number (10) 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 1398392994240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2736979153920).

1398392994240 is an abundant number, since it is smaller than the sum of its proper divisors (4075565313600).

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

1398392994240 is an equidigital number, since it uses as much as digits as its factorization.

1398392994240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 30233088, while the sum is 63.

The spelling of 1398392994240 in words is "one trillion, three hundred ninety-eight billion, three hundred ninety-two million, nine hundred ninety-four thousand, two hundred forty".