45423540 has 72 divisors (see below), whose sum is σ = 138345480. Its totient is φ = 12063744.

The previous prime is 45423527. The next prime is 45423557. The reversal of 45423540 is 4532454.

It can be written as a sum of positive squares in 4 ways, for example, as 2965284 + 42458256 = 1722^2 + 6516^2 .

It is a super-2 number, since 2×45423540² = 4126595972263200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73312 + ... + 73928.

It is an arithmetic number, because the mean of its divisors is an integer number (1921465).

Almost surely, 2^45423540 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 45423540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69172740).

45423540 is an abundant number, since it is smaller than the sum of its proper divisors (92921940).

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

45423540 is a wasteful number, since it uses less digits than its factorization.

45423540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 45423540 is about 6739.6988063266. The cubic root of 45423540 is about 356.8017636336.

Adding to 45423540 its reverse (4532454), we get a palindrome (49955994).

The spelling of 45423540 in words is "forty-five million, four hundred twenty-three thousand, five hundred forty".