45438939 has 48 divisors (see below), whose sum is σ = 81681600. Its totient is φ = 23701248.

The previous prime is 45438929. The next prime is 45438973. The reversal of 45438939 is 93983454.

It is a happy number.

It is not a de Polignac number, because 45438939 - 2⁵ = 45438907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45438894 and 45438903.

It is not an unprimeable number, because it can be changed into a prime (45438929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89017 + ... + 89525.

It is an arithmetic number, because the mean of its divisors is an integer number (1701700).

Almost surely, 2^45438939 is an apocalyptic number.

45438939 is a deficient number, since it is larger than the sum of its proper divisors (36242661).

45438939 is a wasteful number, since it uses less digits than its factorization.

45438939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 641 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 45438939 is about 6740.8411196230. The cubic root of 45438939 is about 356.8420787770.

It can be divided in two parts, 454 and 38939, that added together give a palindrome (39393).

The spelling of 45438939 in words is "forty-five million, four hundred thirty-eight thousand, nine hundred thirty-nine".