45013840 has 20 divisors (see below), whose sum is σ = 104657364. Its totient is φ = 18005504.

The previous prime is 45013823. The next prime is 45013847. The reversal of 45013840 is 4831054.

It can be written as a sum of positive squares in 2 ways, for example, as 7706176 + 37307664 = 2776^2 + 6108^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45013847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281257 + ... + 281416.

Almost surely, 2^45013840 is an apocalyptic number.

45013840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45013840 is an abundant number, since it is smaller than the sum of its proper divisors (59643524).

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

45013840 is a wasteful number, since it uses less digits than its factorization.

45013840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562686 (or 562680 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 45013840 is about 6709.2354258887. The cubic root of 45013840 is about 355.7257914545.

Adding to 45013840 its reverse (4831054), we get a palindrome (49844894).

The spelling of 45013840 in words is "forty-five million, thirteen thousand, eight hundred forty".