55607140 has 12 divisors (see below), whose sum is σ = 116775036. Its totient is φ = 22242848.

The previous prime is 55607131. The next prime is 55607141. The reversal of 55607140 is 4170655.

It can be written as a sum of positive squares in 2 ways, for example, as 29942784 + 25664356 = 5472^2 + 5066^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55607099 and 55607108.

It is not an unprimeable number, because it can be changed into a prime (55607141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390159 + ... + 1390198.

It is an arithmetic number, because the mean of its divisors is an integer number (9731253).

Almost surely, 2^55607140 is an apocalyptic number.

It is an amenable number.

55607140 is an abundant number, since it is smaller than the sum of its proper divisors (61167896).

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

55607140 is a wasteful number, since it uses less digits than its factorization.

55607140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780366 (or 2780364 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 55607140 is about 7457.0195118425. The cubic root of 55607140 is about 381.6894765474.

Adding to 55607140 its reverse (4170655), we get a palindrome (59777795).

The spelling of 55607140 in words is "fifty-five million, six hundred seven thousand, one hundred forty".