1398861436 has 48 divisors (see below), whose sum is σ = 2868493824. Its totient is φ = 584490816.

The previous prime is 1398861421. The next prime is 1398861461. The reversal of 1398861436 is 6341688931.

It is a self number, because there is not a number n which added to its sum of digits gives 1398861436.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239001 + ... + 244783.

It is an arithmetic number, because the mean of its divisors is an integer number (59760288).

Almost surely, 2^1398861436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1398861436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1434246912).

1398861436 is an abundant number, since it is smaller than the sum of its proper divisors (1469632388).

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

1398861436 is a wasteful number, since it uses less digits than its factorization.

1398861436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010 (or 6008 counting only the distinct ones).

The product of its digits is 746496, while the sum is 49.

The square root of 1398861436 is about 37401.3560716721. The cubic root of 1398861436 is about 1118.3855981777.

The spelling of 1398861436 in words is "one billion, three hundred ninety-eight million, eight hundred sixty-one thousand, four hundred thirty-six".