54781880 has 32 divisors (see below), whose sum is σ = 125105040. Its totient is φ = 21584640.

The previous prime is 54781877. The next prime is 54781897. The reversal of 54781880 is 8818745.

Added to its reverse (8818745) it gives a square (63600625 = 7975²).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7541 + ... + 12900.

Almost surely, 2^54781880 is an apocalyptic number.

It is an amenable number.

54781880 is an abundant number, since it is smaller than the sum of its proper divisors (70323160).

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

54781880 is a wasteful number, since it uses less digits than its factorization.

54781880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20519 (or 20515 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 54781880 is about 7401.4782307320. The cubic root of 54781880 is about 379.7918527659.

Adding to 54781880 its reverse (8818745), we get a square (63600625 = 7975²).

The spelling of 54781880 in words is "fifty-four million, seven hundred eighty-one thousand, eight hundred eighty".