7440006 has 32 divisors (see below), whose sum is σ = 17372160. Its totient is φ = 2079936.

The previous prime is 7439977. The next prime is 7440011. The reversal of 7440006 is 6000447.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90 + ... + 3858.

It is an arithmetic number, because the mean of its divisors is an integer number (542880).

Almost surely, 2^7440006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7440006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8686080).

7440006 is an abundant number, since it is smaller than the sum of its proper divisors (9932154).

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

7440006 is a wasteful number, since it uses less digits than its factorization.

7440006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 7440006 is about 2727.6374392503. The cubic root of 7440006 is about 195.2200540122.

The spelling of 7440006 in words is "seven million, four hundred forty thousand, six".