1706978440 has 16 divisors (see below), whose sum is σ = 3840701580. Its totient is φ = 682791360.

The previous prime is 1706978431. The next prime is 1706978453. The reversal of 1706978440 is 448796071.

It can be written as a sum of positive squares in 2 ways, for example, as 1578790756 + 128187684 = 39734^2 + 11322^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21337191 + ... + 21337270.

Almost surely, 2^1706978440 is an apocalyptic number.

1706978440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1706978440 is an abundant number, since it is smaller than the sum of its proper divisors (2133723140).

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

1706978440 is a wasteful number, since it uses less digits than its factorization.

1706978440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42674472 (or 42674468 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 1706978440 is about 41315.5956026293. The cubic root of 1706978440 is about 1195.1140312395.

The spelling of 1706978440 in words is "one billion, seven hundred six million, nine hundred seventy-eight thousand, four hundred forty".