1398811884 has 192 divisors, whose sum is σ = 3808788480. Its totient is φ = 396887040.

The previous prime is 1398811879. The next prime is 1398811891. The reversal of 1398811884 is 4881188931.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8581587 + ... + 8581749.

It is an arithmetic number, because the mean of its divisors is an integer number (19837440).

Almost surely, 2^1398811884 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 1398811884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904394240).

1398811884 is an abundant number, since it is smaller than the sum of its proper divisors (2409976596).

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

1398811884 is a wasteful number, since it uses less digits than its factorization.

1398811884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 298 counting only the distinct ones).

The product of its digits is 442368, while the sum is 51.

The square root of 1398811884 is about 37400.6936299315. The cubic root of 1398811884 is about 1118.3723924624.

The spelling of 1398811884 in words is "one billion, three hundred ninety-eight million, eight hundred eleven thousand, eight hundred eighty-four".