55687938 has 8 divisors (see below), whose sum is σ = 111375888. Its totient is φ = 18562644.

The previous prime is 55687909. The next prime is 55687939. The reversal of 55687938 is 83978655.

It is a sphenic number, since it is the product of 3 distinct primes.

55687938 is an admirable number.

It is a super-3 number, since 3×55687938³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55687939) 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, 4640656 + ... + 4640667.

It is an arithmetic number, because the mean of its divisors is an integer number (13921986).

Almost surely, 2^55687938 is an apocalyptic number.

55687938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55687938 is a wasteful number, since it uses less digits than its factorization.

55687938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9281328.

The product of its digits is 1814400, while the sum is 51.

The square root of 55687938 is about 7462.4351253461. The cubic root of 55687938 is about 381.8742539069.

The spelling of 55687938 in words is "fifty-five million, six hundred eighty-seven thousand, nine hundred thirty-eight".