1355971898 has 32 divisors (see below), whose sum is σ = 2167948800. Its totient is φ = 634276656.

The previous prime is 1355971891. The next prime is 1355971909. The reversal of 1355971898 is 8981795531.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1355971891) 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, 1108115 + ... + 1109337.

It is an arithmetic number, because the mean of its divisors is an integer number (67748400).

Almost surely, 2^1355971898 is an apocalyptic number.

1355971898 is a deficient number, since it is larger than the sum of its proper divisors (811976902).

1355971898 is a wasteful number, since it uses less digits than its factorization.

1355971898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586.

The product of its digits is 2721600, while the sum is 56.

The square root of 1355971898 is about 36823.5237042845. The cubic root of 1355971898 is about 1106.8367309934.

The spelling of 1355971898 in words is "one billion, three hundred fifty-five million, nine hundred seventy-one thousand, eight hundred ninety-eight".