55527440 has 40 divisors (see below), whose sum is σ = 136698840. Its totient is φ = 20903936.

The previous prime is 55527421. The next prime is 55527463. The reversal of 55527440 is 4472555.

It can be written as a sum of positive squares in 4 ways, for example, as 30647296 + 24880144 = 5536^2 + 4988^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 55527397 and 55527406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19055 + ... + 21774.

It is an arithmetic number, because the mean of its divisors is an integer number (3417471).

Almost surely, 2^55527440 is an apocalyptic number.

It is an amenable number.

55527440 is an abundant number, since it is smaller than the sum of its proper divisors (81171400).

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

55527440 is a wasteful number, since it uses less digits than its factorization.

55527440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40859 (or 40853 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 32.

The square root of 55527440 is about 7451.6736375126. The cubic root of 55527440 is about 381.5070347691.

Adding to 55527440 its reverse (4472555), we get a palindrome (59999995).

The spelling of 55527440 in words is "fifty-five million, five hundred twenty-seven thousand, four hundred forty".