54731920 has 40 divisors (see below), whose sum is σ = 128277504. Its totient is φ = 21716352.

The previous prime is 54731909. The next prime is 54731921. The reversal of 54731920 is 2913745.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (54731921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7467 + ... + 12853.

Almost surely, 2^54731920 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 54731920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64138752).

54731920 is an abundant number, since it is smaller than the sum of its proper divisors (73545584).

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

54731920 is a wasteful number, since it uses less digits than its factorization.

54731920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5527 (or 5521 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 54731920 is about 7398.1024594148. The cubic root of 54731920 is about 379.6763634108.

The spelling of 54731920 in words is "fifty-four million, seven hundred thirty-one thousand, nine hundred twenty".