1397738898 has 24 divisors (see below), whose sum is σ = 3046575168. Its totient is φ = 463122072.

The previous prime is 1397738887. The next prime is 1397738917. The reversal of 1397738898 is 8988377931.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 229486 + ... + 235497.

It is an arithmetic number, because the mean of its divisors is an integer number (126940632).

Almost surely, 2^1397738898 is an apocalyptic number.

1397738898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1397738898 is an abundant number, since it is smaller than the sum of its proper divisors (1648836270).

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

1397738898 is a wasteful number, since it uses less digits than its factorization.

1397738898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465158 (or 465155 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The square root of 1397738898 is about 37386.3464114909. The cubic root of 1397738898 is about 1118.0863628464.

The spelling of 1397738898 in words is "one billion, three hundred ninety-seven million, seven hundred thirty-eight thousand, eight hundred ninety-eight".