1797986394 has 12 divisors (see below), whose sum is σ = 3895637226. Its totient is φ = 599328792.

The previous prime is 1797986389. The next prime is 1797986417. The reversal of 1797986394 is 4936897971.

1797986394 is a `hidden beast` number, since 179 + 79 + 8 + 6 + 394 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1388531169 + 409455225 = 37263^2 + 20235^2 .

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, 49944049 + ... + 49944084.

Almost surely, 2^1797986394 is an apocalyptic number.

1797986394 is an abundant number, since it is smaller than the sum of its proper divisors (2097650832).

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

1797986394 is a wasteful number, since it uses less digits than its factorization.

1797986394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99888141 (or 99888138 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The square root of 1797986394 is about 42402.6696565204. The cubic root of 1797986394 is about 1215.9866314067.

The spelling of 1797986394 in words is "one billion, seven hundred ninety-seven million, nine hundred eighty-six thousand, three hundred ninety-four".