3678786409 has 9 divisors (see below), whose sum is σ = 3715107069. Its totient is φ = 3642819180.

The previous prime is 3678786361. The next prime is 3678786469. The reversal of 3678786409 is 9046878763.

It is a happy number.

The square root of 3678786409 is 60653.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 3678786409 - 2²⁷ = 3544568681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3678786469) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7945312 + ... + 7945774.

Almost surely, 2^3678786409 is an apocalyptic number.

3678786409 is the 60653-rd square number.

3678786409 is the 30327-th centered octagonal number.

It is an amenable number.

3678786409 is a deficient number, since it is larger than the sum of its proper divisors (36320660).

3678786409 is an frugal number, since it uses more digits than its factorization.

3678786409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 58.

The cubic root of 3678786409 is about 1543.7187926095.

The spelling of 3678786409 in words is "three billion, six hundred seventy-eight million, seven hundred eighty-six thousand, four hundred nine".