55398788 has 6 divisors (see below), whose sum is σ = 96947886. Its totient is φ = 27699392.

The previous prime is 55398773. The next prime is 55398799. The reversal of 55398788 is 88789355.

It can be written as a sum of positive squares in only one way, i.e., 27857284 + 27541504 = 5278^2 + 5248^2 .

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, 6924845 + ... + 6924852.

It is an arithmetic number, because the mean of its divisors is an integer number (16157981).

Almost surely, 2^55398788 is an apocalyptic number.

It is an amenable number.

55398788 is a deficient number, since it is larger than the sum of its proper divisors (41549098).

55398788 is a wasteful number, since it uses less digits than its factorization.

55398788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13849701 (or 13849699 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 53.

The square root of 55398788 is about 7443.0362084300. The cubic root of 55398788 is about 381.2121679561.

The spelling of 55398788 in words is "fifty-five million, three hundred ninety-eight thousand, seven hundred eighty-eight".