1398438556 has 6 divisors (see below), whose sum is σ = 2447267480. Its totient is φ = 699219276.

The previous prime is 1398438553. The next prime is 1398438583. The reversal of 1398438556 is 6558348931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398438553) by changing a digit.

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 as a sum of consecutive naturals, namely, 174804816 + ... + 174804823.

Almost surely, 2^1398438556 is an apocalyptic number.

It is an amenable number.

1398438556 is a deficient number, since it is larger than the sum of its proper divisors (1048828924).

1398438556 is a wasteful number, since it uses less digits than its factorization.

1398438556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349609643 (or 349609641 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 52.

The square root of 1398438556 is about 37395.7023734011. The cubic root of 1398438556 is about 1118.2728897147.

The spelling of 1398438556 in words is "one billion, three hundred ninety-eight million, four hundred thirty-eight thousand, five hundred fifty-six".