55838740 has 12 divisors (see below), whose sum is σ = 117261396. Its totient is φ = 22335488.

The previous prime is 55838711. The next prime is 55838749. The reversal of 55838740 is 4783855.

It can be written as a sum of positive squares in 2 ways, for example, as 25522704 + 30316036 = 5052^2 + 5506^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55838693 and 55838702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55838749) 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, 1395949 + ... + 1395988.

It is an arithmetic number, because the mean of its divisors is an integer number (9771783).

Almost surely, 2^55838740 is an apocalyptic number.

It is an amenable number.

55838740 is an abundant number, since it is smaller than the sum of its proper divisors (61422656).

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

55838740 is a wasteful number, since it uses less digits than its factorization.

55838740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791946 (or 2791944 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 55838740 is about 7472.5323686151. The cubic root of 55838740 is about 382.2186462443.

The spelling of 55838740 in words is "fifty-five million, eight hundred thirty-eight thousand, seven hundred forty".