1398997080 has 384 divisors, whose sum is σ = 5250510720. Its totient is φ = 320348160.

The previous prime is 1398997079. The next prime is 1398997111. The reversal of 1398997080 is 807998931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4413082 + ... + 4413398.

It is an arithmetic number, because the mean of its divisors is an integer number (13673205).

Almost surely, 2^1398997080 is an apocalyptic number.

1398997080 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 1398997080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2625255360).

1398997080 is an abundant number, since it is smaller than the sum of its proper divisors (3851513640).

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

1398997080 is a wasteful number, since it uses less digits than its factorization.

1398997080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The square root of 1398997080 is about 37403.1693844252. The cubic root of 1398997080 is about 1118.4217460022.

The spelling of 1398997080 in words is "one billion, three hundred ninety-eight million, nine hundred ninety-seven thousand, eighty".