7440038 has 8 divisors (see below), whose sum is σ = 11225088. Its totient is φ = 3698344.

The previous prime is 7440011. The next prime is 7440047. The reversal of 7440038 is 8300447.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 7439989 and 7440016.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10406 + ... + 11097.

It is an arithmetic number, because the mean of its divisors is an integer number (1403136).

Almost surely, 2^7440038 is an apocalyptic number.

7440038 is a deficient number, since it is larger than the sum of its proper divisors (3785050).

7440038 is a wasteful number, since it uses less digits than its factorization.

7440038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21678.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 7440038 is about 2727.6433051262. The cubic root of 7440038 is about 195.2203338969.

The spelling of 7440038 in words is "seven million, four hundred forty thousand, thirty-eight".