55789138 has 24 divisors (see below), whose sum is σ = 89476992. Its totient is φ = 26082624.

The previous prime is 55789133. The next prime is 55789157. The reversal of 55789138 is 83198755.

It is a super-2 number, since 2×55789138² = 6224855837566088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55789133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151831 + ... + 152197.

It is an arithmetic number, because the mean of its divisors is an integer number (3728208).

Almost surely, 2^55789138 is an apocalyptic number.

55789138 is a deficient number, since it is larger than the sum of its proper divisors (33687854).

55789138 is a wasteful number, since it uses less digits than its factorization.

55789138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 649 counting only the distinct ones).

The product of its digits is 302400, while the sum is 46.

The square root of 55789138 is about 7469.2126760456. The cubic root of 55789138 is about 382.1054367544.

The spelling of 55789138 in words is "fifty-five million, seven hundred eighty-nine thousand, one hundred thirty-eight".