1398209280 has 288 divisors, whose sum is σ = 4945531584. Its totient is φ = 334430208.

The previous prime is 1398209279. The next prime is 1398209311. The reversal of 1398209280 is 829028931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1846662 + ... + 1847418.

Almost surely, 2^1398209280 is an apocalyptic number.

1398209280 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 1398209280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2472765792).

1398209280 is an abundant number, since it is smaller than the sum of its proper divisors (3547322304).

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

1398209280 is a wasteful number, since it uses less digits than its factorization.

1398209280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1398209280 is about 37392.6367083146. The cubic root of 1398209280 is about 1118.2117722283.

The spelling of 1398209280 in words is "one billion, three hundred ninety-eight million, two hundred nine thousand, two hundred eighty".