378787729 has 16 divisors (see below), whose sum is σ = 403223040. Its totient is φ = 355294080.

The previous prime is 378787723. The next prime is 378787733. The reversal of 378787729 is 927787873.

It is a cyclic number.

It is not a de Polignac number, because 378787729 - 2¹¹ = 378785681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378787723) 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, 132099 + ... + 134935.

It is an arithmetic number, because the mean of its divisors is an integer number (25201440).

Almost surely, 2^378787729 is an apocalyptic number.

It is an amenable number.

378787729 is a deficient number, since it is larger than the sum of its proper divisors (24435311).

378787729 is a wasteful number, since it uses less digits than its factorization.

378787729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000.

The product of its digits is 8297856, while the sum is 58.

The square root of 378787729 is about 19462.4697559174. The cubic root of 378787729 is about 723.5445897465.

The spelling of 378787729 in words is "three hundred seventy-eight million, seven hundred eighty-seven thousand, seven hundred twenty-nine".