45004240 has 40 divisors (see below), whose sum is σ = 104993280. Its totient is φ = 17940096.

The previous prime is 45004229. The next prime is 45004241. The reversal of 45004240 is 4240054.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45004241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27937 + ... + 29503.

It is an arithmetic number, because the mean of its divisors is an integer number (2624832).

Almost surely, 2^45004240 is an apocalyptic number.

45004240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45004240 is an abundant number, since it is smaller than the sum of its proper divisors (59989040).

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

45004240 is a wasteful number, since it uses less digits than its factorization.

45004240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939 (or 1933 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 45004240 is about 6708.5199559963. The cubic root of 45004240 is about 355.7005013779.

Adding to 45004240 its reverse (4240054), we get a palindrome (49244294).

The spelling of 45004240 in words is "forty-five million, four thousand, two hundred forty".