45840138 has 8 divisors (see below), whose sum is σ = 91680288. Its totient is φ = 15280044.

The previous prime is 45840133. The next prime is 45840139. The reversal of 45840138 is 83104854.

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

45840138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 45840099 and 45840108.

It is not an unprimeable number, because it can be changed into a prime (45840133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3820006 + ... + 3820017.

It is an arithmetic number, because the mean of its divisors is an integer number (11460036).

Almost surely, 2^45840138 is an apocalyptic number.

45840138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

45840138 is a wasteful number, since it uses less digits than its factorization.

45840138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7640028.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 45840138 is about 6770.5345431509. The cubic root of 45840138 is about 357.8892378131.

The spelling of 45840138 in words is "forty-five million, eight hundred forty thousand, one hundred thirty-eight".