7278432 has 48 divisors (see below), whose sum is σ = 21837312. Its totient is φ = 2079360.

The previous prime is 7278421. The next prime is 7278473. The reversal of 7278432 is 2348727.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 7278393 and 7278402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4744 + ... + 6087.

It is an arithmetic number, because the mean of its divisors is an integer number (454944).

Almost surely, 2^7278432 is an apocalyptic number.

It is an amenable number.

7278432 is an abundant number, since it is smaller than the sum of its proper divisors (14558880).

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

7278432 is a wasteful number, since it uses less digits than its factorization.

7278432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10851 (or 10843 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 7278432 is about 2697.8569272665. The cubic root of 7278432 is about 193.7965060752.

The spelling of 7278432 in words is "seven million, two hundred seventy-eight thousand, four hundred thirty-two".