54990728 has 32 divisors (see below), whose sum is σ = 114874200. Its totient is φ = 24503808.

The previous prime is 54990721. The next prime is 54990739. The reversal of 54990728 is 82709945.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42016324 + 12974404 = 6482^2 + 3602^2 .

It is not an unprimeable number, because it can be changed into a prime (54990721) 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, 6101 + ... + 12132.

Almost surely, 2^54990728 is an apocalyptic number.

54990728 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

54990728 is an abundant number, since it is smaller than the sum of its proper divisors (59883472).

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

54990728 is a wasteful number, since it uses less digits than its factorization.

54990728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18281 (or 18277 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 54990728 is about 7415.5733426351. The cubic root of 54990728 is about 380.2738745871.

The spelling of 54990728 in words is "fifty-four million, nine hundred ninety thousand, seven hundred twenty-eight".