1274638336 has 52 divisors (see below), whose sum is σ = 2608604152. Its totient is φ = 622411776.

The previous prime is 1274638333. The next prime is 1274638397. The reversal of 1274638336 is 6338364721.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 1274638292 and 1274638301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1274638333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172510 + ... + 179746.

Almost surely, 2^1274638336 is an apocalyptic number.

1274638336 is a gapful number since it is divisible by the number (16) 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 1274638336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1304302076).

1274638336 is an abundant number, since it is smaller than the sum of its proper divisors (1333965816).

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

1274638336 is an frugal number, since it uses more digits than its factorization.

1274638336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7304 (or 7282 counting only the distinct ones).

The product of its digits is 435456, while the sum is 43.

The square root of 1274638336 is about 35702.0774745672. The cubic root of 1274638336 is about 1084.2489045946.

The spelling of 1274638336 in words is "one billion, two hundred seventy-four million, six hundred thirty-eight thousand, three hundred thirty-six".