1398066438 has 8 divisors (see below), whose sum is σ = 2796132888. Its totient is φ = 466022144.

The previous prime is 1398066409. The next prime is 1398066443. The reversal of 1398066438 is 8346608931.

It is a sphenic number, since it is the product of 3 distinct primes.

1398066438 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116505531 + ... + 116505542.

It is an arithmetic number, because the mean of its divisors is an integer number (349516611).

Almost surely, 2^1398066438 is an apocalyptic number.

1398066438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1398066438 is a wasteful number, since it uses less digits than its factorization.

1398066438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233011078.

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 1398066438 is about 37390.7266310779. The cubic root of 1398066438 is about 1118.1736918427.

The spelling of 1398066438 in words is "one billion, three hundred ninety-eight million, sixty-six thousand, four hundred thirty-eight".