55540340 has 24 divisors (see below), whose sum is σ = 117089280. Its totient is φ = 22129568.

The previous prime is 55540327. The next prime is 55540349. The reversal of 55540340 is 4304555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55540349) 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, 20 + ... + 10539.

It is an arithmetic number, because the mean of its divisors is an integer number (4878720).

Almost surely, 2^55540340 is an apocalyptic number.

It is an amenable number.

55540340 is an abundant number, since it is smaller than the sum of its proper divisors (61548940).

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

55540340 is a wasteful number, since it uses less digits than its factorization.

55540340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10831 (or 10829 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 55540340 is about 7452.5391646069. The cubic root of 55540340 is about 381.5365760775.

Adding to 55540340 its reverse (4304555), we get a palindrome (59844895).

The spelling of 55540340 in words is "fifty-five million, five hundred forty thousand, three hundred forty".