55999960 has 16 divisors (see below), whose sum is σ = 126000000. Its totient is φ = 22399968.

The previous prime is 55999913. The next prime is 55999961. The reversal of 55999960 is 6999955.

It is a junction number, because it is equal to n+sod(n) for n = 55999898 and 55999907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55999961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699960 + ... + 700039.

It is an arithmetic number, because the mean of its divisors is an integer number (7875000).

Almost surely, 2^55999960 is an apocalyptic number.

It is an amenable number.

55999960 is an abundant number, since it is smaller than the sum of its proper divisors (70000040).

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

55999960 is a wasteful number, since it uses less digits than its factorization.

55999960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400010 (or 1400006 counting only the distinct ones).

The product of its (nonzero) digits is 984150, while the sum is 52.

The square root of 55999960 is about 7483.3121009350. The cubic root of 55999960 is about 382.5861454625.

The spelling of 55999960 in words is "fifty-five million, nine hundred ninety-nine thousand, nine hundred sixty".