54405040 has 40 divisors (see below), whose sum is σ = 127255248. Its totient is φ = 21630720.

The previous prime is 54405007. The next prime is 54405041. The reversal of 54405040 is 4050445.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (54405041) 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, 11875 + ... + 15805.

Almost surely, 2^54405040 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 54405040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63627624).

54405040 is an abundant number, since it is smaller than the sum of its proper divisors (72850208).

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

54405040 is a wasteful number, since it uses less digits than its factorization.

54405040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117 (or 4111 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 54405040 is about 7375.9772233922. The cubic root of 54405040 is about 378.9189960618.

Adding to 54405040 its reverse (4050445), we get a palindrome (58455485).

The spelling of 54405040 in words is "fifty-four million, four hundred five thousand, forty".