1398881365 has 32 divisors (see below), whose sum is σ = 2032957440. Its totient is φ = 902664000.

The previous prime is 1398881359. The next prime is 1398881377. The reversal of 1398881365 is 5631888931.

It is not a de Polignac number, because 1398881365 - 2²⁷ = 1264663637 is a prime.

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, 93450 + ... + 107380.

It is an arithmetic number, because the mean of its divisors is an integer number (63529920).

Almost surely, 2^1398881365 is an apocalyptic number.

It is an amenable number.

1398881365 is a deficient number, since it is larger than the sum of its proper divisors (634076075).

1398881365 is a wasteful number, since it uses less digits than its factorization.

1398881365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14113.

The product of its digits is 1244160, while the sum is 52.

The square root of 1398881365 is about 37401.6224915444. The cubic root of 1398881365 is about 1118.3909092114.

The spelling of 1398881365 in words is "one billion, three hundred ninety-eight million, eight hundred eighty-one thousand, three hundred sixty-five".