55236940 has 48 divisors (see below), whose sum is σ = 129507840. Its totient is φ = 19615680.

The previous prime is 55236919. The next prime is 55236953. The reversal of 55236940 is 4963255.

55236940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55236940² = 6102239081127200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55236896 and 55236905.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6541 + ... + 12379.

It is an arithmetic number, because the mean of its divisors is an integer number (2698080).

Almost surely, 2^55236940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55236940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64753920).

55236940 is an abundant number, since it is smaller than the sum of its proper divisors (74270900).

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

55236940 is a wasteful number, since it uses less digits than its factorization.

55236940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5902 (or 5900 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 55236940 is about 7432.1558110685. The cubic root of 55236940 is about 380.8405677157.

The spelling of 55236940 in words is "fifty-five million, two hundred thirty-six thousand, nine hundred forty".