7440000 has 160 divisors (see below), whose sum is σ = 25491840. Its totient is φ = 1920000.

The previous prime is 7439977. The next prime is 7440011. The reversal of 7440000 is 447.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 239985 + ... + 240015.

It is an arithmetic number, because the mean of its divisors is an integer number (159324).

Almost surely, 2^7440000 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 7440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12745920).

7440000 is an abundant number, since it is smaller than the sum of its proper divisors (18051840).

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

7440000 is an equidigital number, since it uses as much as digits as its factorization.

7440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 7440000 is about 2727.6363393972. The cubic root of 7440000 is about 195.2200015337.

Adding to 7440000 its reverse (447), we get a palindrome (7440447).

The spelling of 7440000 in words is "seven million, four hundred forty thousand".