1289940674 has 16 divisors (see below), whose sum is σ = 2111597856. Its totient is φ = 586118400.

The previous prime is 1289940667. The next prime is 1289940683. The reversal of 1289940674 is 4760499821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59669 + ... + 78359.

It is an arithmetic number, because the mean of its divisors is an integer number (131974866).

Almost surely, 2^1289940674 is an apocalyptic number.

1289940674 is a deficient number, since it is larger than the sum of its proper divisors (821657182).

1289940674 is a wasteful number, since it uses less digits than its factorization.

1289940674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21841.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 1289940674 is about 35915.7440964266. The cubic root of 1289940674 is about 1088.5705454642.

The spelling of 1289940674 in words is "one billion, two hundred eighty-nine million, nine hundred forty thousand, six hundred seventy-four".