1284376634 has 24 divisors (see below), whose sum is σ = 1988040348. Its totient is φ = 622310400.

The previous prime is 1284376633. The next prime is 1284376693. The reversal of 1284376634 is 4366734821.

It can be written as a sum of positive squares in 6 ways, for example, as 1162605409 + 121771225 = 34097^2 + 11035^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1284376633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 801434 + ... + 803034.

Almost surely, 2^1284376634 is an apocalyptic number.

1284376634 is a deficient number, since it is larger than the sum of its proper divisors (703663714).

1284376634 is a wasteful number, since it uses less digits than its factorization.

1284376634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970 (or 1933 counting only the distinct ones).

The product of its digits is 580608, while the sum is 44.

The square root of 1284376634 is about 35838.2007639893. The cubic root of 1284376634 is about 1087.0031401658.

The spelling of 1284376634 in words is "one billion, two hundred eighty-four million, three hundred seventy-six thousand, six hundred thirty-four".