2827421978 has 4 divisors (see below), whose sum is σ = 4241132970. Its totient is φ = 1413710988.

The previous prime is 2827421941. The next prime is 2827422011. The reversal of 2827421978 is 8791247282.

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., 1924840129 + 902581849 = 43873^2 + 30043^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 706855493 + ... + 706855496.

Almost surely, 2^2827421978 is an apocalyptic number.

2827421978 is a deficient number, since it is larger than the sum of its proper divisors (1413710992).

2827421978 is a wasteful number, since it uses less digits than its factorization.

2827421978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413710991.

The product of its digits is 903168, while the sum is 50.

The square root of 2827421978 is about 53173.5082348344. The cubic root of 2827421978 is about 1414.0460180669.

The spelling of 2827421978 in words is "two billion, eight hundred twenty-seven million, four hundred twenty-one thousand, nine hundred seventy-eight".