54791640 has 112 divisors (see below), whose sum is σ = 184935600. Its totient is φ = 14603328.

The previous prime is 54791617. The next prime is 54791717. The reversal of 54791640 is 4619745.

54791640 is a `hidden beast` number, since 5 + 4 + 7 + 9 + 1 + 640 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 54791595 and 54791604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 28221 + ... + 30099.

Almost surely, 2^54791640 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 54791640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92467800).

54791640 is an abundant number, since it is smaller than the sum of its proper divisors (130143960).

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

54791640 is a wasteful number, since it uses less digits than its factorization.

54791640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1889 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 54791640 is about 7402.1375291195. The cubic root of 54791640 is about 379.8144061380.

The spelling of 54791640 in words is "fifty-four million, seven hundred ninety-one thousand, six hundred forty".