1398171588 has 48 divisors (see below), whose sum is σ = 3626150976. Its totient is φ = 415692160.

The previous prime is 1398171569. The next prime is 1398171589. The reversal of 1398171588 is 8851718931.

It is a self number, because there is not a number n which added to its sum of digits gives 1398171588.

It is not an unprimeable number, because it can be changed into a prime (1398171589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92931 + ... + 106922.

It is an arithmetic number, because the mean of its divisors is an integer number (75544812).

Almost surely, 2^1398171588 is an apocalyptic number.

It is an amenable number.

1398171588 is an abundant number, since it is smaller than the sum of its proper divisors (2227979388).

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

1398171588 is a wasteful number, since it uses less digits than its factorization.

1398171588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199924 (or 199922 counting only the distinct ones).

The product of its digits is 483840, while the sum is 51.

The square root of 1398171588 is about 37392.1327019468. The cubic root of 1398171588 is about 1118.2017241338.

The spelling of 1398171588 in words is "one billion, three hundred ninety-eight million, one hundred seventy-one thousand, five hundred eighty-eight".