53998 has 24 divisors (see below), whose sum is σ = 102600. Its totient is φ = 21168.

The previous prime is 53993. The next prime is 54001. The reversal of 53998 is 89935.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53993) 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, 1848 + ... + 1876.

It is an arithmetic number, because the mean of its divisors is an integer number (4275).

2⁵³⁹⁹⁸ is an apocalyptic number.

53998 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

53998 is a deficient number, since it is larger than the sum of its proper divisors (48602).

53998 is a wasteful number, since it uses less digits than its factorization.

53998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 57 counting only the distinct ones).

The product of its digits is 9720, while the sum is 34.

The square root of 53998 is about 232.3746974178. The cubic root of 53998 is about 37.7971648537.

Subtracting 53998 from its reverse (89935), we obtain a cube (35937 = 33³).

The spelling of 53998 in words is "fifty-three thousand, nine hundred ninety-eight".