55397938 has 12 divisors (see below), whose sum is σ = 86868558. Its totient is φ = 26494160.

The previous prime is 55397933. The next prime is 55397957. The reversal of 55397938 is 83979355.

55397938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 54508689 + 889249 = 7383^2 + 943^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55397891 and 55397900.

It is not an unprimeable number, because it can be changed into a prime (55397933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25123 + ... + 27238.

Almost surely, 2^55397938 is an apocalyptic number.

55397938 is a deficient number, since it is larger than the sum of its proper divisors (31470620).

55397938 is a wasteful number, since it uses less digits than its factorization.

55397938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52409 (or 52386 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 49.

The square root of 55397938 is about 7442.9791078573. The cubic root of 55397938 is about 381.2102182624.

The spelling of 55397938 in words is "fifty-five million, three hundred ninety-seven thousand, nine hundred thirty-eight".