55987398 has 24 divisors (see below), whose sum is σ = 123596928. Its totient is φ = 18310032.

The previous prime is 55987397. The next prime is 55987417. The reversal of 55987398 is 89378955.

55987398 is a `hidden beast` number, since 559 + 87 + 3 + 9 + 8 = 666.

55987398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55987397) 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 11 ways as a sum of consecutive naturals, for example, 28390 + ... + 30297.

It is an arithmetic number, because the mean of its divisors is an integer number (5149872).

Almost surely, 2^55987398 is an apocalyptic number.

55987398 is an abundant number, since it is smaller than the sum of its proper divisors (67609530).

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

55987398 is a wasteful number, since it uses less digits than its factorization.

55987398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58748 (or 58745 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The square root of 55987398 is about 7482.4727196295. The cubic root of 55987398 is about 382.5575358791.

It can be divided in two parts, 5598 and 7398, that added together give a square (12996 = 114²).

The spelling of 55987398 in words is "fifty-five million, nine hundred eighty-seven thousand, three hundred ninety-eight".