1273778352 has 320 divisors, whose sum is σ = 4606848000. Its totient is φ = 327352320.

The previous prime is 1273778299. The next prime is 1273778353. The reversal of 1273778352 is 2538773721.

It is a happy number.

It is a super-2 number, since 2×1273778352² = 3245022580047671808, which contains 22 as substring.

Its product of digits (493920) is a multiple of the sum of its prime factors (441).

It is a junction number, because it is equal to n+sod(n) for n = 1273778298 and 1273778307.

It is not an unprimeable number, because it can be changed into a prime (1273778353) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4956208 + ... + 4956464.

It is an arithmetic number, because the mean of its divisors is an integer number (14396400).

Almost surely, 2^1273778352 is an apocalyptic number.

1273778352 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 1273778352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2303424000).

1273778352 is an abundant number, since it is smaller than the sum of its proper divisors (3333069648).

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

1273778352 is a wasteful number, since it uses less digits than its factorization.

1273778352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 429 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 1273778352 is about 35690.0315494397. The cubic root of 1273778352 is about 1084.0050062631.

The spelling of 1273778352 in words is "one billion, two hundred seventy-three million, seven hundred seventy-eight thousand, three hundred fifty-two".