55422378 has 48 divisors (see below), whose sum is σ = 131560416. Its totient is φ = 16722720.

The previous prime is 55422361. The next prime is 55422379. The reversal of 55422378 is 87322455.

It is not an unprimeable number, because it can be changed into a prime (55422379) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62325 + ... + 63207.

It is an arithmetic number, because the mean of its divisors is an integer number (2740842).

Almost surely, 2^55422378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55422378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65780208).

55422378 is an abundant number, since it is smaller than the sum of its proper divisors (76138038).

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

55422378 is a wasteful number, since it uses less digits than its factorization.

55422378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219 (or 1216 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 55422378 is about 7444.6207425228. The cubic root of 55422378 is about 381.2662697348.

The spelling of 55422378 in words is "fifty-five million, four hundred twenty-two thousand, three hundred seventy-eight".