1269668648 has 16 divisors (see below), whose sum is σ = 2438693460. Its totient is φ = 619350400.

The previous prime is 1269668641. The next prime is 1269668683. The reversal of 1269668648 is 8468669621.

It can be written as a sum of positive squares in 2 ways, for example, as 813504484 + 456164164 = 28522^2 + 21358^2 .

It is a super-2 number, since 2×1269668648² = 3224116951428295808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1269668593 and 1269668602.

It is not an unprimeable number, because it can be changed into a prime (1269668641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935143 + ... + 1935798.

Almost surely, 2^1269668648 is an apocalyptic number.

It is an amenable number.

1269668648 is a deficient number, since it is larger than the sum of its proper divisors (1169024812).

1269668648 is a wasteful number, since it uses less digits than its factorization.

1269668648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870988 (or 3870984 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 56.

The square root of 1269668648 is about 35632.4100784665. The cubic root of 1269668648 is about 1082.8379430840.

The spelling of 1269668648 in words is "one billion, two hundred sixty-nine million, six hundred sixty-eight thousand, six hundred forty-eight".