7449138 has 16 divisors (see below), whose sum is σ = 16553760. Its totient is φ = 2483028.

The previous prime is 7449133. The next prime is 7449151. The reversal of 7449138 is 8319447.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7449133) 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 7 ways as a sum of consecutive naturals, for example, 68920 + ... + 69027.

It is an arithmetic number, because the mean of its divisors is an integer number (1034610).

Almost surely, 2^7449138 is an apocalyptic number.

7449138 is an abundant number, since it is smaller than the sum of its proper divisors (9104622).

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

7449138 is a wasteful number, since it uses less digits than its factorization.

7449138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137958 (or 137952 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 7449138 is about 2729.3109020410. The cubic root of 7449138 is about 195.2998935821.

It can be divided in two parts, 74491 and 38, that added together give a square (74529 = 273²).

The spelling of 7449138 in words is "seven million, four hundred forty-nine thousand, one hundred thirty-eight".