1398534557 has 8 divisors (see below), whose sum is σ = 1599493632. Its totient is φ = 1197867600.

The previous prime is 1398534493. The next prime is 1398534569. The reversal of 1398534557 is 7554358931.

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

It is a cyclic number.

It is not a de Polignac number, because 1398534557 - 2⁶ = 1398534493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398534587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62669 + ... + 82002.

It is an arithmetic number, because the mean of its divisors is an integer number (199936704).

Almost surely, 2^1398534557 is an apocalyptic number.

It is an amenable number.

1398534557 is a deficient number, since it is larger than the sum of its proper divisors (200959075).

1398534557 is a wasteful number, since it uses less digits than its factorization.

1398534557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146059.

The product of its digits is 2268000, while the sum is 50.

The square root of 1398534557 is about 37396.9859346980. The cubic root of 1398534557 is about 1118.2984784588.

The spelling of 1398534557 in words is "one billion, three hundred ninety-eight million, five hundred thirty-four thousand, five hundred fifty-seven".