1278053992 has 8 divisors (see below), whose sum is σ = 2396351250. Its totient is φ = 639026992.

The previous prime is 1278053989. The next prime is 1278054007. The reversal of 1278053992 is 2993508721.

It can be written as a sum of positive squares in only one way, i.e., 1268356996 + 9696996 = 35614^2 + 3114^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79878367 + ... + 79878382.

Almost surely, 2^1278053992 is an apocalyptic number.

It is an amenable number.

1278053992 is a deficient number, since it is larger than the sum of its proper divisors (1118297258).

1278053992 is a wasteful number, since it uses less digits than its factorization.

1278053992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159756755 (or 159756751 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1278053992 is about 35749.8810067950. The cubic root of 1278053992 is about 1085.2165302238.

The spelling of 1278053992 in words is "one billion, two hundred seventy-eight million, fifty-three thousand, nine hundred ninety-two".