1398308880 has 80 divisors (see below), whose sum is σ = 4338633024. Its totient is φ = 372549120.

The previous prime is 1398308839. The next prime is 1398308881. The reversal of 1398308880 is 888038931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1398308881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388690 + ... + 392270.

Almost surely, 2^1398308880 is an apocalyptic number.

1398308880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1398308880 is an abundant number, since it is smaller than the sum of its proper divisors (2940324144).

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

1398308880 is a wasteful number, since it uses less digits than its factorization.

1398308880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5224 (or 5218 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 1398308880 is about 37393.9684976067. The cubic root of 1398308880 is about 1118.2383231530.

The spelling of 1398308880 in words is "one billion, three hundred ninety-eight million, three hundred eight thousand, eight hundred eighty".