45144540 has 144 divisors (see below), whose sum is σ = 162419712. Its totient is φ = 10310976.

The previous prime is 45144529. The next prime is 45144557. The reversal of 45144540 is 4544154.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33357 + ... + 34683.

Almost surely, 2^45144540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45144540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81209856).

45144540 is an abundant number, since it is smaller than the sum of its proper divisors (117275172).

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

45144540 is a wasteful number, since it uses less digits than its factorization.

45144540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358 (or 1344 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 45144540 is about 6718.9686708601. The cubic root of 45144540 is about 356.0697481485.

Adding to 45144540 its reverse (4544154), we get a palindrome (49688694).

The spelling of 45144540 in words is "forty-five million, one hundred forty-four thousand, five hundred forty".