45390845 has 18 divisors (see below), whose sum is σ = 57378174. Its totient is φ = 34468720.

The previous prime is 45390841. The next prime is 45390847. The reversal of 45390845 is 54809354.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 36312676 + 9078169 = 6026^2 + 3013^2 .

It is not a de Polignac number, because 45390845 - 2² = 45390841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45390799 and 45390808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45390841) 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 17 ways as a sum of consecutive naturals, for example, 346430 + ... + 346560.

Almost surely, 2^45390845 is an apocalyptic number.

It is an amenable number.

45390845 is a deficient number, since it is larger than the sum of its proper divisors (11987329).

45390845 is an equidigital number, since it uses as much as digits as its factorization.

45390845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 45390845 is about 6737.2728162069. The cubic root of 45390845 is about 356.7161367121.

The spelling of 45390845 in words is "forty-five million, three hundred ninety thousand, eight hundred forty-five".