45639340 has 24 divisors (see below), whose sum is σ = 98073360. Its totient is φ = 17830848.

The previous prime is 45639323. The next prime is 45639343. The reversal of 45639340 is 4393654.

It is a happy number.

45639340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 45639296 and 45639305.

It is not an unprimeable number, because it can be changed into a prime (45639343) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 25675 + ... + 27394.

It is an arithmetic number, because the mean of its divisors is an integer number (4086390).

Almost surely, 2^45639340 is an apocalyptic number.

It is an amenable number.

45639340 is an abundant number, since it is smaller than the sum of its proper divisors (52434020).

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

45639340 is a wasteful number, since it uses less digits than its factorization.

45639340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53121 (or 53119 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 45639340 is about 6755.6894540824. The cubic root of 45639340 is about 357.3659072957.

The spelling of 45639340 in words is "forty-five million, six hundred thirty-nine thousand, three hundred forty".