2015730378 has 12 divisors (see below), whose sum is σ = 4367415858. Its totient is φ = 671910120.

The previous prime is 2015730371. The next prime is 2015730389. The reversal of 2015730378 is 8730375102.

2015730378 is a `hidden beast` number, since 201 + 57 + 30 + 378 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1625944329 + 389786049 = 40323^2 + 19743^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2015730371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55992493 + ... + 55992528.

Almost surely, 2^2015730378 is an apocalyptic number.

2015730378 is an abundant number, since it is smaller than the sum of its proper divisors (2351685480).

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

2015730378 is a wasteful number, since it uses less digits than its factorization.

2015730378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111985029 (or 111985026 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 2015730378 is about 44896.8860612849. The cubic root of 2015730378 is about 1263.2155999071.

The spelling of 2015730378 in words is "two billion, fifteen million, seven hundred thirty thousand, three hundred seventy-eight".