54991928 has 16 divisors (see below), whose sum is σ = 108537000. Its totient is φ = 26048736.

The previous prime is 54991903. The next prime is 54991933. The reversal of 54991928 is 82919945.

It is a super-2 number, since 2×54991928² = 6048224290314368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180743 + ... + 181046.

Almost surely, 2^54991928 is an apocalyptic number.

It is an amenable number.

54991928 is a deficient number, since it is larger than the sum of its proper divisors (53545072).

54991928 is a wasteful number, since it uses less digits than its factorization.

54991928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361814 (or 361810 counting only the distinct ones).

The product of its digits is 233280, while the sum is 47.

The square root of 54991928 is about 7415.6542529975. The cubic root of 54991928 is about 380.2766406615.

The spelling of 54991928 in words is "fifty-four million, nine hundred ninety-one thousand, nine hundred twenty-eight".