1397587898 has 12 divisors (see below), whose sum is σ = 2438648442. Its totient is φ = 598966200.

The previous prime is 1397587889. The next prime is 1397587903. The reversal of 1397587898 is 8987857931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1142642809 + 254945089 = 33803^2 + 15967^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7130453 + ... + 7130648.

Almost surely, 2^1397587898 is an apocalyptic number.

1397587898 is a deficient number, since it is larger than the sum of its proper divisors (1041060544).

1397587898 is a wasteful number, since it uses less digits than its factorization.

1397587898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14261117 (or 14261110 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 65.

The square root of 1397587898 is about 37384.3269031288. The cubic root of 1397587898 is about 1118.0460985021.

The spelling of 1397587898 in words is "one billion, three hundred ninety-seven million, five hundred eighty-seven thousand, eight hundred ninety-eight".