55398724 has 6 divisors (see below), whose sum is σ = 96947774. Its totient is φ = 27699360.

The previous prime is 55398719. The next prime is 55398769. The reversal of 55398724 is 42789355.

It can be written as a sum of positive squares in only one way, i.e., 52272900 + 3125824 = 7230^2 + 1768^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6924837 + ... + 6924844.

Almost surely, 2^55398724 is an apocalyptic number.

It is an amenable number.

55398724 is a deficient number, since it is larger than the sum of its proper divisors (41549050).

55398724 is a wasteful number, since it uses less digits than its factorization.

55398724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13849685 (or 13849683 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

The square root of 55398724 is about 7443.0319091080. The cubic root of 55398724 is about 381.2120211563.

The spelling of 55398724 in words is "fifty-five million, three hundred ninety-eight thousand, seven hundred twenty-four".