2687450978 has 4 divisors (see below), whose sum is σ = 4031176470. Its totient is φ = 1343725488.

The previous prime is 2687450963. The next prime is 2687450989. The reversal of 2687450978 is 8790547862.

2687450978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 2502300529 + 185150449 = 50023^2 + 13607^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671862743 + ... + 671862746.

Almost surely, 2^2687450978 is an apocalyptic number.

2687450978 is a deficient number, since it is larger than the sum of its proper divisors (1343725492).

2687450978 is a wasteful number, since it uses less digits than its factorization.

2687450978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343725491.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The square root of 2687450978 is about 51840.6305710106. The cubic root of 2687450978 is about 1390.3159880614.

The spelling of 2687450978 in words is "two billion, six hundred eighty-seven million, four hundred fifty thousand, nine hundred seventy-eight".