1355449986 has 36 divisors (see below), whose sum is σ = 3228067206. Its totient is φ = 410741760.

The previous prime is 1355449919. The next prime is 1355449993. The reversal of 1355449986 is 6899445531.

1355449986 is a `hidden beast` number, since 1 + 3 + 5 + 544 + 9 + 98 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 972504225 + 382945761 = 31185^2 + 19569^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 308991 + ... + 313346.

Almost surely, 2^1355449986 is an apocalyptic number.

1355449986 is an abundant number, since it is smaller than the sum of its proper divisors (1872617220).

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

1355449986 is a wasteful number, since it uses less digits than its factorization.

1355449986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622367 (or 622353 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 1355449986 is about 36816.4363566057. The cubic root of 1355449986 is about 1106.6947060483.

It can be divided in two parts, 135544 and 9986, that added together give a triangular number (145530 = T₅₃₉).

The spelling of 1355449986 in words is "one billion, three hundred fifty-five million, four hundred forty-nine thousand, nine hundred eighty-six".