55415448 has 128 divisors (see below), whose sum is σ = 170553600. Its totient is φ = 16531200.

The previous prime is 55415431. The next prime is 55415453. The reversal of 55415448 is 84451455.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197068 + ... + 197348.

It is an arithmetic number, because the mean of its divisors is an integer number (1332450).

Almost surely, 2^55415448 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 55415448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85276800).

55415448 is an abundant number, since it is smaller than the sum of its proper divisors (115138152).

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

55415448 is a wasteful number, since it uses less digits than its factorization.

55415448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 380 counting only the distinct ones).

The product of its digits is 64000, while the sum is 36.

The square root of 55415448 is about 7444.1552912335. The cubic root of 55415448 is about 381.2503779267.

The spelling of 55415448 in words is "fifty-five million, four hundred fifteen thousand, four hundred forty-eight".