53999980 has 12 divisors (see below), whose sum is σ = 113400000. Its totient is φ = 21599984.

The previous prime is 53999977. The next prime is 53999989. The reversal of 53999980 is 8999935.

It is not an unprimeable number, because it can be changed into a prime (53999989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1349980 + ... + 1350019.

It is an arithmetic number, because the mean of its divisors is an integer number (9450000).

Almost surely, 2^53999980 is an apocalyptic number.

It is an amenable number.

53999980 is an abundant number, since it is smaller than the sum of its proper divisors (59400020).

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

53999980 is a wasteful number, since it uses less digits than its factorization.

53999980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2700008 (or 2700006 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 52.

The square root of 53999980 is about 7348.4678675218. The cubic root of 53999980 is about 377.9762683047.

The spelling of 53999980 in words is "fifty-three million, nine hundred ninety-nine thousand, nine hundred eighty".