54781688 has 24 divisors (see below), whose sum is σ = 111227400. Its totient is φ = 25283232.

The previous prime is 54781687. The next prime is 54781691. The reversal of 54781688 is 88618745.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54781687) 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, 18908 + ... + 21611.

It is an arithmetic number, because the mean of its divisors is an integer number (4634475).

Almost surely, 2^54781688 is an apocalyptic number.

It is an amenable number.

54781688 is an abundant number, since it is smaller than the sum of its proper divisors (56445712).

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

54781688 is a wasteful number, since it uses less digits than its factorization.

54781688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40551 (or 40534 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The square root of 54781688 is about 7401.4652603387. The cubic root of 54781688 is about 379.7914090662.

The spelling of 54781688 in words is "fifty-four million, seven hundred eighty-one thousand, six hundred eighty-eight".