54788391 has 12 divisors (see below), whose sum is σ = 90444432. Its totient is φ = 31307616.

The previous prime is 54788353. The next prime is 54788401. The reversal of 54788391 is 19388745.

It is not a de Polignac number, because 54788391 - 2¹⁰ = 54787367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54788351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 434766 + ... + 434891.

It is an arithmetic number, because the mean of its divisors is an integer number (7537036).

Almost surely, 2^54788391 is an apocalyptic number.

54788391 is a deficient number, since it is larger than the sum of its proper divisors (35656041).

54788391 is a wasteful number, since it uses less digits than its factorization.

54788391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869670 (or 869667 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 54788391 is about 7401.9180622322. The cubic root of 54788391 is about 379.8068986582.

The spelling of 54788391 in words is "fifty-four million, seven hundred eighty-eight thousand, three hundred ninety-one".