45378644 has 12 divisors (see below), whose sum is σ = 84084084. Its totient is φ = 21354624.

The previous prime is 45378629. The next prime is 45378689. The reversal of 45378644 is 44687354.

It can be written as a sum of positive squares in 2 ways, for example, as 21270544 + 24108100 = 4612^2 + 4910^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333599 + ... + 333734.

It is an arithmetic number, because the mean of its divisors is an integer number (7007007).

Almost surely, 2^45378644 is an apocalyptic number.

It is an amenable number.

45378644 is a deficient number, since it is larger than the sum of its proper divisors (38705440).

45378644 is a wasteful number, since it uses less digits than its factorization.

45378644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667354 (or 667352 counting only the distinct ones).

The product of its digits is 322560, while the sum is 41.

The square root of 45378644 is about 6736.3672702726. The cubic root of 45378644 is about 356.6841722369.

It can be divided in two parts, 453 and 78644, that added together give a palindrome (79097).

The spelling of 45378644 in words is "forty-five million, three hundred seventy-eight thousand, six hundred forty-four".