16278240 has 96 divisors (see below), whose sum is σ = 55956096. Its totient is φ = 3944960.

The previous prime is 16278239. The next prime is 16278259. The reversal of 16278240 is 4287261.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 16278198 and 16278207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3739 + ... + 6821.

It is an arithmetic number, because the mean of its divisors is an integer number (582876).

Almost surely, 2^16278240 is an apocalyptic number.

16278240 is a gapful number since it is divisible by the number (10) 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 16278240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27978048).

16278240 is an abundant number, since it is smaller than the sum of its proper divisors (39677856).

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

16278240 is a wasteful number, since it uses less digits than its factorization.

16278240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112 (or 3104 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 16278240 is about 4034.6300945688. The cubic root of 16278240 is about 253.4364923055.

The spelling of 16278240 in words is "sixteen million, two hundred seventy-eight thousand, two hundred forty".