7288740 has 36 divisors (see below), whose sum is σ = 22109724. Its totient is φ = 1943616.

The previous prime is 7288739. The next prime is 7288753. The reversal of 7288740 is 478827.

It can be written as a sum of positive squares in 2 ways, for example, as 1557504 + 5731236 = 1248^2 + 2394^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 7288695 and 7288704.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20067 + ... + 20426.

It is an arithmetic number, because the mean of its divisors is an integer number (614159).

Almost surely, 2^7288740 is an apocalyptic number.

It is an amenable number.

7288740 is an abundant number, since it is smaller than the sum of its proper divisors (14820984).

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

7288740 is a wasteful number, since it uses less digits than its factorization.

7288740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40508 (or 40503 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 7288740 is about 2699.7666565835. The cubic root of 7288740 is about 193.8879503164.

It can be divided in two parts, 72887 and 40, that added together give a palindrome (72927).

The spelling of 7288740 in words is "seven million, two hundred eighty-eight thousand, seven hundred forty".