55427040 has 144 divisors (see below), whose sum is σ = 192550176. Its totient is φ = 14515200.

The previous prime is 55427011. The next prime is 55427041. The reversal of 55427040 is 4072455.

55427040 is a `hidden beast` number, since 554 + 2 + 70 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 55426995 and 55427013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55427041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87525 + ... + 88155.

It is an arithmetic number, because the mean of its divisors is an integer number (1337154).

Almost surely, 2^55427040 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 55427040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96275088).

55427040 is an abundant number, since it is smaller than the sum of its proper divisors (137123136).

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

55427040 is a wasteful number, since it uses less digits than its factorization.

55427040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 55427040 is about 7444.9338479264. The cubic root of 55427040 is about 381.2769598421.

Adding to 55427040 its reverse (4072455), we get a palindrome (59499495).

The spelling of 55427040 in words is "fifty-five million, four hundred twenty-seven thousand, forty".