54781428 has 48 divisors (see below), whose sum is σ = 138143936. Its totient is φ = 16796160.

The previous prime is 54781421. The next prime is 54781439. The reversal of 54781428 is 82418745.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54781421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67143 + ... + 67953.

Almost surely, 2^54781428 is an apocalyptic number.

It is an amenable number.

54781428 is an abundant number, since it is smaller than the sum of its proper divisors (83362508).

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

54781428 is a wasteful number, since it uses less digits than its factorization.

54781428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 1262 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 54781428 is about 7401.4476962281. The cubic root of 54781428 is about 379.7908082211.

The spelling of 54781428 in words is "fifty-four million, seven hundred eighty-one thousand, four hundred twenty-eight".