55940436 has 24 divisors (see below), whose sum is σ = 145031040. Its totient is φ = 18646776.

The previous prime is 55940431. The next prime is 55940447. The reversal of 55940436 is 63404955.

It is a happy number.

55940436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 55940436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55940431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258876 + ... + 259091.

It is an arithmetic number, because the mean of its divisors is an integer number (6042960).

Almost surely, 2^55940436 is an apocalyptic number.

It is an amenable number.

55940436 is an abundant number, since it is smaller than the sum of its proper divisors (89090604).

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

55940436 is a wasteful number, since it uses less digits than its factorization.

55940436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517980 (or 517972 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 55940436 is about 7479.3339275633. Note that the first 3 decimals coincide. The cubic root of 55940436 is about 382.4505433942.

Adding to 55940436 its product of nonzero digits (64800), we get a triangular number (56005236 = T₁₀₅₈₃).

The spelling of 55940436 in words is "fifty-five million, nine hundred forty thousand, four hundred thirty-six".