7478724 has 48 divisors (see below), whose sum is σ = 19414080. Its totient is φ = 2221440.

The previous prime is 7478717. The next prime is 7478729. The reversal of 7478724 is 4278747.

It is not an unprimeable number, because it can be changed into a prime (7478729) by changing a digit.

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, 6462 + ... + 7530.

It is an arithmetic number, because the mean of its divisors is an integer number (404460).

Almost surely, 2^7478724 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 7478724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9707040).

7478724 is an abundant number, since it is smaller than the sum of its proper divisors (11935356).

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

7478724 is a wasteful number, since it uses less digits than its factorization.

7478724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140 (or 1138 counting only the distinct ones).

The product of its digits is 87808, while the sum is 39.

The square root of 7478724 is about 2734.7255803828. The cubic root of 7478724 is about 195.5581118142.

It can be divided in two parts, 7 and 478724, that added together give a triangular number (478731 = T₉₇₈).

The spelling of 7478724 in words is "seven million, four hundred seventy-eight thousand, seven hundred twenty-four".