55896640 has 56 divisors (see below), whose sum is σ = 136730232. Its totient is φ = 21749760.

The previous prime is 55896623. The next prime is 55896641. The reversal of 55896640 is 4669855.

It can be written as a sum of positive squares in 4 ways, for example, as 16257024 + 39639616 = 4032^2 + 6296^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55896641) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9480 + ... + 14200.

Almost surely, 2^55896640 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 55896640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68365116).

55896640 is an abundant number, since it is smaller than the sum of its proper divisors (80833592).

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

55896640 is a wasteful number, since it uses less digits than its factorization.

55896640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4775 (or 4765 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 55896640 is about 7476.4055534729. The cubic root of 55896640 is about 382.3507099626.

The spelling of 55896640 in words is "fifty-five million, eight hundred ninety-six thousand, six hundred forty".