42554440 has 32 divisors (see below), whose sum is σ = 98338680. Its totient is φ = 16561152.

The previous prime is 42554381. The next prime is 42554443. The reversal of 42554440 is 4445524.

It can be written as a sum of positive squares in 4 ways, for example, as 42536484 + 17956 = 6522^2 + 134^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42554399 and 42554408.

It is not an unprimeable number, because it can be changed into a prime (42554443) 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, 12897 + ... + 15856.

Almost surely, 2^42554440 is an apocalyptic number.

42554440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42554440 is an abundant number, since it is smaller than the sum of its proper divisors (55784240).

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

42554440 is a wasteful number, since it uses less digits than its factorization.

42554440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28801 (or 28797 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 42554440 is about 6523.3764263608. The cubic root of 42554440 is about 349.1255449345.

Adding to 42554440 its reverse (4445524), we get a palindrome (46999964).

The spelling of 42554440 in words is "forty-two million, five hundred fifty-four thousand, four hundred forty".