45440138 has 8 divisors (see below), whose sum is σ = 68785860. Its totient is φ = 22511520.

The previous prime is 45440119. The next prime is 45440159. The reversal of 45440138 is 83104454.

45440138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 45064369 + 375769 = 6713^2 + 613^2 .

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

It is a super-2 number, since 2×45440138² = 4129612282918088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 45440138.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104003 + ... + 104438.

Almost surely, 2^45440138 is an apocalyptic number.

45440138 is a deficient number, since it is larger than the sum of its proper divisors (23345722).

45440138 is a wasteful number, since it uses less digits than its factorization.

45440138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208552.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 45440138 is about 6740.9300545251. The cubic root of 45440138 is about 356.8452174205.

The spelling of 45440138 in words is "forty-five million, four hundred forty thousand, one hundred thirty-eight".