7278472 has 8 divisors (see below), whose sum is σ = 13647150. Its totient is φ = 3639232.

The previous prime is 7278421. The next prime is 7278473. The reversal of 7278472 is 2748727.

It can be written as a sum of positive squares in only one way, i.e., 3944196 + 3334276 = 1986^2 + 1826^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7278473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454897 + ... + 454912.

Almost surely, 2^7278472 is an apocalyptic number.

It is an amenable number.

7278472 is a deficient number, since it is larger than the sum of its proper divisors (6368678).

7278472 is a wasteful number, since it uses less digits than its factorization.

7278472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909815 (or 909811 counting only the distinct ones).

The product of its digits is 43904, while the sum is 37.

The square root of 7278472 is about 2697.8643405479. The cubic root of 7278472 is about 193.7968610896.

It can be divided in two parts, 7278 and 472, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 7278472 in words is "seven million, two hundred seventy-eight thousand, four hundred seventy-two".