55407744 has 96 divisors (see below), whose sum is σ = 182245440. Its totient is φ = 15828480.

The previous prime is 55407733. The next prime is 55407767. The reversal of 55407744 is 44770455.

55407744 is a `hidden beast` number, since 5 + 540 + 77 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a junction number, because it is equal to n+sod(n) for n = 55407699 and 55407708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4629 + ... + 11499.

It is an arithmetic number, because the mean of its divisors is an integer number (1898390).

Almost surely, 2^55407744 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 55407744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91122720).

55407744 is an abundant number, since it is smaller than the sum of its proper divisors (126837696).

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

55407744 is a wasteful number, since it uses less digits than its factorization.

55407744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6898 (or 6883 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 55407744 is about 7443.6378203134. The cubic root of 55407744 is about 381.2327096342.

The spelling of 55407744 in words is "fifty-five million, four hundred seven thousand, seven hundred forty-four".