7278912 has 42 divisors (see below), whose sum is σ = 20865338. Its totient is φ = 2426112.

The previous prime is 7278883. The next prime is 7278917. The reversal of 7278912 is 2198727.

It can be written as a sum of positive squares in only one way, i.e., 4769856 + 2509056 = 2184^2 + 1584^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7278917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5743 + ... + 6894.

Almost surely, 2^7278912 is an apocalyptic number.

7278912 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

7278912 is an abundant number, since it is smaller than the sum of its proper divisors (13586426).

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

7278912 is a wasteful number, since it uses less digits than its factorization.

7278912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12655 (or 12642 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 7278912 is about 2697.9458852987. The cubic root of 7278912 is about 193.8007661630.

The spelling of 7278912 in words is "seven million, two hundred seventy-eight thousand, nine hundred twelve".