55978838 has 8 divisors (see below), whose sum is σ = 84029400. Its totient is φ = 27969040.

The previous prime is 55978837. The next prime is 55978843. The reversal of 55978838 is 83887955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55978838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55978837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6488 + ... + 12411.

It is an arithmetic number, because the mean of its divisors is an integer number (10503675).

Almost surely, 2^55978838 is an apocalyptic number.

55978838 is a deficient number, since it is larger than the sum of its proper divisors (28050562).

55978838 is a wasteful number, since it uses less digits than its factorization.

55978838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20382.

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

The square root of 55978838 is about 7481.9006943423. The cubic root of 55978838 is about 382.5380382807.

It can be divided in two parts, 559 and 78838, that added together give a palindrome (79397).

The spelling of 55978838 in words is "fifty-five million, nine hundred seventy-eight thousand, eight hundred thirty-eight".