55622448 has 90 divisors (see below), whose sum is σ = 181103364. Its totient is φ = 15890112.

The previous prime is 55622429. The next prime is 55622449. The reversal of 55622448 is 84422655.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (55622449) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3115 + ... + 10997.

Almost surely, 2^55622448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55622448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90551682).

55622448 is an abundant number, since it is smaller than the sum of its proper divisors (125480916).

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

55622448 is a wasteful number, since it uses less digits than its factorization.

55622448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7911 (or 7895 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 55622448 is about 7458.0458566571. The cubic root of 55622448 is about 381.7244982276.

The spelling of 55622448 in words is "fifty-five million, six hundred twenty-two thousand, four hundred forty-eight".