55618938 has 12 divisors (see below), whose sum is σ = 120507738. Its totient is φ = 18539640.

The previous prime is 55618931. The next prime is 55618943. The reversal of 55618938 is 83981655.

55618938 is a `hidden beast` number, since 5 + 561 + 89 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 53100369 + 2518569 = 7287^2 + 1587^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55618893 and 55618902.

It is not an unprimeable number, because it can be changed into a prime (55618931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1544953 + ... + 1544988.

Almost surely, 2^55618938 is an apocalyptic number.

55618938 is an abundant number, since it is smaller than the sum of its proper divisors (64888800).

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

55618938 is a wasteful number, since it uses less digits than its factorization.

55618938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089949 (or 3089946 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 55618938 is about 7457.8105366119. The cubic root of 55618938 is about 381.7164686088.

The spelling of 55618938 in words is "fifty-five million, six hundred eighteen thousand, nine hundred thirty-eight".