1289374632 has 192 divisors, whose sum is σ = 4487313600. Its totient is φ = 340018560.

The previous prime is 1289374621. The next prime is 1289374649. The reversal of 1289374632 is 2364739821.

1289374632 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 3 + 7 + 4 + 632 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 132907 + ... + 142277.

It is an arithmetic number, because the mean of its divisors is an integer number (23371425).

Almost surely, 2^1289374632 is an apocalyptic number.

1289374632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1289374632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2243656800).

1289374632 is an abundant number, since it is smaller than the sum of its proper divisors (3197938968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1289374632 is a wasteful number, since it uses less digits than its factorization.

1289374632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9413 (or 9396 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 1289374632 is about 35907.8630943140. The cubic root of 1289374632 is about 1088.4112960735.

The spelling of 1289374632 in words is "one billion, two hundred eighty-nine million, three hundred seventy-four thousand, six hundred thirty-two".