55506940 has 12 divisors (see below), whose sum is σ = 116564616. Its totient is φ = 22202768.

The previous prime is 55506931. The next prime is 55506947. The reversal of 55506940 is 4960555.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55506896 and 55506905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55506947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1387654 + ... + 1387693.

It is an arithmetic number, because the mean of its divisors is an integer number (9713718).

Almost surely, 2^55506940 is an apocalyptic number.

It is an amenable number.

55506940 is an abundant number, since it is smaller than the sum of its proper divisors (61057676).

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

55506940 is a wasteful number, since it uses less digits than its factorization.

55506940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775356 (or 2775354 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 55506940 is about 7450.2979806180. The cubic root of 55506940 is about 381.4600798649.

The spelling of 55506940 in words is "fifty-five million, five hundred six thousand, nine hundred forty".