55380389 has 16 divisors (see below), whose sum is σ = 59439744. Its totient is φ = 51480000.

The previous prime is 55380371. The next prime is 55380397. The reversal of 55380389 is 98308355.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55380389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55380329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220514 + ... + 220764.

It is an arithmetic number, because the mean of its divisors is an integer number (3714984).

Almost surely, 2^55380389 is an apocalyptic number.

It is an amenable number.

55380389 is a deficient number, since it is larger than the sum of its proper divisors (4059355).

55380389 is a wasteful number, since it uses less digits than its factorization.

55380389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 55380389 is about 7441.8001182510. The cubic root of 55380389 is about 381.1699606590.

The spelling of 55380389 in words is "fifty-five million, three hundred eighty thousand, three hundred eighty-nine".