13278750 has 40 divisors (see below), whose sum is σ = 33195624. Its totient is φ = 3540000.

The previous prime is 13278737. The next prime is 13278791. The reversal of 13278750 is 5787231.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 1980 + ... + 5520.

Almost surely, 2^13278750 is an apocalyptic number.

13278750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13278750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16597812).

13278750 is an abundant number, since it is smaller than the sum of its proper divisors (19916874).

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

13278750 is an equidigital number, since it uses as much as digits as its factorization.

13278750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3566 (or 3551 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 13278750 is about 3644.0019209655. The cubic root of 13278750 is about 236.8021992544.

It can be divided in two parts, 13278 and 750, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13278750 in words is "thirteen million, two hundred seventy-eight thousand, seven hundred fifty".