1678278436 has 12 divisors (see below), whose sum is σ = 3091565680. Its totient is φ = 794973960.

The previous prime is 1678278431. The next prime is 1678278463. The reversal of 1678278436 is 6348728761.

It is not an unprimeable number, because it can be changed into a prime (1678278431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11041230 + ... + 11041381.

Almost surely, 2^1678278436 is an apocalyptic number.

It is an amenable number.

1678278436 is a deficient number, since it is larger than the sum of its proper divisors (1413287244).

1678278436 is a wasteful number, since it uses less digits than its factorization.

1678278436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22082634 (or 22082632 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 52.

The square root of 1678278436 is about 40966.7967505393. The cubic root of 1678278436 is about 1188.3781866090.

The spelling of 1678278436 in words is "one billion, six hundred seventy-eight million, two hundred seventy-eight thousand, four hundred thirty-six".