55964640 has 48 divisors (see below), whose sum is σ = 176290128. Its totient is φ = 14923776.

The previous prime is 55964617. The next prime is 55964651. The reversal of 55964640 is 4646955.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57817 + ... + 58776.

It is an arithmetic number, because the mean of its divisors is an integer number (3672711).

Almost surely, 2^55964640 is an apocalyptic number.

It is an amenable number.

55964640 is an abundant number, since it is smaller than the sum of its proper divisors (120325488).

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

55964640 is a wasteful number, since it uses less digits than its factorization.

55964640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116611 (or 116603 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 55964640 is about 7480.9518111000. The cubic root of 55964640 is about 382.5056943063.

The spelling of 55964640 in words is "fifty-five million, nine hundred sixty-four thousand, six hundred forty".