2007940778 has 4 divisors (see below), whose sum is σ = 3011911170. Its totient is φ = 1003970388.

The previous prime is 2007940757. The next prime is 2007940793. The reversal of 2007940778 is 8770497002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2007667249 + 273529 = 44807^2 + 523^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501985193 + ... + 501985196.

Almost surely, 2^2007940778 is an apocalyptic number.

2007940778 is a deficient number, since it is larger than the sum of its proper divisors (1003970392).

2007940778 is a wasteful number, since it uses less digits than its factorization.

2007940778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003970391.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 2007940778 is about 44810.0521981396. The cubic root of 2007940778 is about 1261.5863068221.

The spelling of 2007940778 in words is "two billion, seven million, nine hundred forty thousand, seven hundred seventy-eight".