45481240 has 64 divisors (see below), whose sum is σ = 117964800. Its totient is φ = 15458688.

The previous prime is 45481223. The next prime is 45481243. The reversal of 45481240 is 4218454.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 45481199 and 45481208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45481243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34921 + ... + 36199.

It is an arithmetic number, because the mean of its divisors is an integer number (1843200).

Almost surely, 2^45481240 is an apocalyptic number.

45481240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45481240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58982400).

45481240 is an abundant number, since it is smaller than the sum of its proper divisors (72483560).

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

45481240 is a wasteful number, since it uses less digits than its factorization.

45481240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424 (or 1420 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 45481240 is about 6743.9780545313. The cubic root of 45481240 is about 356.9527774817.

Adding to 45481240 its reverse (4218454), we get a palindrome (49699694).

The spelling of 45481240 in words is "forty-five million, four hundred eighty-one thousand, two hundred forty".