7278264 has 72 divisors (see below), whose sum is σ = 22941360. Its totient is φ = 2078496.

The previous prime is 7278263. The next prime is 7278269. The reversal of 7278264 is 4628727.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7278263) 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 17 ways as a sum of consecutive naturals, for example, 2497 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (318630).

Almost surely, 2^7278264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7278264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11470680).

7278264 is an abundant number, since it is smaller than the sum of its proper divisors (15663096).

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

7278264 is a wasteful number, since it uses less digits than its factorization.

7278264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089 (or 2075 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 7278264 is about 2697.8257912623. The cubic root of 7278264 is about 193.7950150002.

The spelling of 7278264 in words is "seven million, two hundred seventy-eight thousand, two hundred sixty-four".