55324720 has 40 divisors (see below), whose sum is σ = 140325840. Its totient is φ = 20117760.

The previous prime is 55324693. The next prime is 55324757. The reversal of 55324720 is 2742355.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30555 + ... + 32314.

It is an arithmetic number, because the mean of its divisors is an integer number (3508146).

Almost surely, 2^55324720 is an apocalyptic number.

It is an amenable number.

55324720 is an abundant number, since it is smaller than the sum of its proper divisors (85001120).

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

55324720 is a wasteful number, since it uses less digits than its factorization.

55324720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62893 (or 62887 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 55324720 is about 7438.0588865644. The cubic root of 55324720 is about 381.0421990400.

The spelling of 55324720 in words is "fifty-five million, three hundred twenty-four thousand, seven hundred twenty".